ライフサイエンスコーパス: noncontrast

1 Intraprocedurally acquired noncontrast 3-dimensional MR angiographic imaging was us

2 tients (all female, 54 +/- 13 years of age), noncontrast 3D EF, end-diastolic volume, and end-systoli

3 Conclusion Noncontrast 3D UTE lung MRI functional parameters of ven

4 l variability in EF of 0.06 might occur with noncontrast 3DE due to physiological differences and mea

5 Noncontrast 3DE was the most reproducible technique for

6 r fracture, 1699 negative for fracture; 1308 noncontrast, 521 contrast enhanced) from 1779 patients (

7 liver segmentation algorithm was applied to noncontrast abdominal CT examinations from consecutive a

8 terials and Methods For external validation, noncontrast abdominal CT images were retrospectively col

9 and abdominal aortic calcium were applied to noncontrast abdominal CT scans from asymptomatic adults

10 ease, the prevalence of hepatic steatosis by noncontrast abdominal CT was not different by HIV status

11 fferently in females and males compared with noncontrast abdominal CT.

12 Purpose To assess whether noncontrast agent-enhanced 3D UTE MRI at submillimeter s

13 le- and conditional) are trained with paired noncontrast and contrast enhanced CTs from seventy-five

14 vances in plaque quantification through both noncontrast and contrast-enhanced computed tomography (C

15 e or recreational leisure sports underwent a noncontrast and contrast-enhanced computed tomography sc

16 Seventy-Five patients with paired noncontrast and contrast-enhanced CT images were randoml

17 Noncontrast and contrast-enhanced CT of the head (Fig 1)

18 Noncontrast and contrast-enhanced CT of the head and CT

19 challenge on a clinical test dataset of both noncontrast and contrast-enhanced CT scans acquired at a

20 long-term savings of $1870 and $2068 versus noncontrast and contrast-enhanced MR cholangiopancreatog

21 l and LA EAT were segmented on preprocedural noncontrast- and contrast-enhanced cardiac CT scans.

22 as the LA EAT volume difference between the noncontrast- and contrast-enhanced scan divided by the t

23 phased contrast-enhanced abdominal CT scans (noncontrast, arterial, venous, and late venous phases).

24 y explores associations between contrast and noncontrast-assessed SMA, SMI, SMD, and demographic fact

25 Results Of 638 noncontrast brain MRI examinations, 36 POC MRI examinati

26 single academic medical center who underwent noncontrast brain MRI from January 2021 to June 2021 wer

27 Background There is increasing interest in noncontrast breast MRI alternatives for tumor visualizat

28 all fraction of all information available in noncontrast cardiac computed tomography (CAC-CT).

29 d extent of coronary artery calcium (CAC) on noncontrast cardiac computed tomography (CT) and of any

30 Noncontrast cardiac computed tomography allows calculati

31 nuation quantification by deep learning from noncontrast cardiac computed tomography can provide prog

32 ECC was measured by noncontrast cardiac computed tomography scan at baseline

33 Noncontrast cardiac computed tomography was performed du

34 Noncontrast cardiac computed tomography was performed in

35 Measured by noncontrast cardiac computed tomography, CAC improves ri

36 SA by 2-dimensional vascular ultrasound and noncontrast cardiac computed tomography.

37 using automated deep learning software from noncontrast cardiac computed tomography.

38 and attenuation measurements quantified from noncontrast cardiac computed tomography.

39 CAC was measured by noncontrast cardiac computed tomography; dichotomized as

40 unity-based Framingham Heart Study underwent noncontrast cardiac CT (2002-2005) and were followed for

41 cluded 55 healthy volunteers who underwent a noncontrast cardiac MRI examination at 1.5 T.

42 based detection of myocardial dysfunction at noncontrast cardiac MRI, facilitating detailed interpati

43 hat derives aligned strain values from cine (noncontrast) cardiac MRI and evaluate performance of the

44 tion (CAC) detected incidentally on standard noncontrast chest computed tomography (CT) provides an o

45 The nongated, noncontrast chest computed tomography scan (NCCT) has em

46 Diagnosis is confirmed with noncontrast chest computed tomography showing dilated ai

47 ring the second ICU hospitalization included noncontrast chest CT (Fig 2), MRI of the chest without c

48 lesion subtyping in COVID-19 pneumonia from noncontrast chest CT enables quantitative assessment of

49 horacic levels (T1-T10) at any conventional, noncontrast chest CT examination.

50 2021, and June 30, 2021, and also underwent noncontrast chest CT scan within 3 years.

51 High-resolution volumetric noncontrast chest CT scans were acquired at 3, 6, and 12

52 Radiomics from noncontrast chest CT were superior to radiologists' asse

53 Participants underwent noncontrast chest CT with (n = 296) and without (n = 266

54 If CAC is identified on standard noncontrast chest CT, it should be scored and reported a

55 women) with COVID-19 pneumonia who underwent noncontrast chest CT.

56 All patients had nongated (contrast or noncontrast) chest CT imaging performed within 1 year be

57 Noncontrast computed tomographic (CT) scan is the most c

58 with SAH and AD were adjusted median time to noncontrast computed tomography (CT) (head CT for patien

59 ents for endovascular thrombectomy (EVT) are noncontrast computed tomography (CT) and CT perfusion (C

60 ) iodixanol 320 and patients who underwent a noncontrast computed tomography (CT) examination.

61 Noncontrast computed tomography (CT) is the standard bra

62 ortic valve calcium score (AVCa) measured on noncontrast computed tomography (CT) is well-established

63 Hepatic steatosis was defined by noncontrast computed tomography (CT) liver-to-spleen (L/

64 sessments including electrocardiogram-gated, noncontrast computed tomography (CT) scans.

65 Noncontrast computed tomography (CT), routinely performe

66 /=25, and selected only on the appearance of noncontrast computed tomography (ie, over one-third midd

67 Hypodensities within an ICH detected by noncontrast computed tomography (NCCT) have been suggest

68 A total of 1393 patients underwent follow-up noncontrast computed tomography and were included in the

69 Noncontrast computed tomography has become the most univ

70 ne disease lies in the continued progress of noncontrast computed tomography in terms of patient safe

71 Additionally, noncontrast computed tomography is being tested in lower

72 Noncontrast computed tomography may provide prognostic i

73 py exposes patients to more radiation than a noncontrast computed tomography of the abdomen and pelvi

74 We performed noncontrast computed tomography on 906 men (566 HIV-infe

75 fluoro-2-deoxy-D-glucose scan in addition to noncontrast computed tomography or magnetic resonance im

76 body surface electrodes was obtained from a noncontrast computed tomography scan.

77 lood pressure readings, medical records, and noncontrast computed tomography scans.

78 pported accuracy and relative ease of use of noncontrast computed tomography, it has become a logical

79 and follow-up hematoma volumes, detected by noncontrast computed tomography, were measured using a c

80 y artery calcification (CAC) was assessed by noncontrast computed tomography, whereas vascular inflam

81 y that can replicate the efficacy of current noncontrast computed tomography.

82 participants aged 30-50 years who underwent noncontrast computed tomography.

83 y such as a simple non-contrast-enhanced, or noncontrast, computed tomographic (CT) detection of coro

84 C score >300 arbitrary units (AU) on cardiac noncontrast computer tomography were randomized to daily

85 ng protocol of sestamibi SPECT/CT and 4D CT (noncontrast, contrast agent-enhanced, arterial, and dela

86 in Outcomes and Measures: Patients underwent noncontrast coronary artery calcium (CAC) CT and contras

87 ic HCV infection) for coronary plaque, using noncontrast coronary computed tomography (CT); 755 also

88 nderwent carotid and femoral ultrasound plus noncontrast coronary computed tomography.

89 rials and Methods In this prospective study, noncontrast CT (all participants, n = 265) was used for

90 ECT) imaging (n = 9) and the remainder using noncontrast CT (NCCT) imaging as their model input.

91 tudies evaluating the diagnostic accuracy of noncontrast CT (NCCT), contrast-enhanced (CECT), and dua

92 atients with large infarcts identified using noncontrast CT alone within 24 hours of stroke onset.

93 In patients undergoing both noncontrast CT and angiography (n=103; 17 SRCs), there w

94 3; 17 SRCs), there was no difference between noncontrast CT and angiography: 0.79 (95% confidence int

95 sment are coronary artery calcium scoring by noncontrast CT and coronary CT angiography, both of whic

96 All patients underwent noncontrast CT and CT perfusion.

97 Stent position on attenuation-correction noncontrast CT and CTA was used to fuse PET and CTA.

98 Artificial Intelligence (GRAPE), leveraging noncontrast CT and deep learning to identify GC.

99 , and scattered infarct structure at 24-hour noncontrast CT and diffusion-weighted MRI were highly pr

100 ative infarct variables at 24-hour follow-up noncontrast CT and diffusion-weighted MRI with 90-day cl

101 rity of suspected patients initially undergo noncontrast CT as the initial imaging testing, and CT an

102 who underwent contrast-enhanced CT (CECT) or noncontrast CT between January 2012 and December 2019.

103 Although noncontrast CT can reveal specific signs indicative of A

104 clinical outcomes of patients selected with noncontrast CT compared with those selected with CTP or

105 Noncontrast CT demonstrated nonspecific diffuse ground g

106 chine learning algorithm that flags abnormal noncontrast CT examinations for ICH was implemented in a

107 lligence-based warning system, iAorta, using noncontrast CT for AAS identification in China, which de

108 investigate if the raw data acquired from a noncontrast CT image contains sufficient information to

109 Program Early CT Score (ASPECTS) regions on noncontrast CT images as the ratio of x-ray attenuation

110 segmentation pipeline for both contrast and noncontrast CT images has allowed for accurate and effic

111 on tool for intracranial hemorrhage (ICH) on noncontrast CT images into an emergent workflow, evaluat

112 tive study, screening or standard diagnostic noncontrast CT images were collected for 290 patients (m

113 She underwent subsequent evaluation with noncontrast CT of the abdomen (Figs 2, 3) and colonoscop

114 She underwent subsequent evaluation with noncontrast CT of the abdomen and colonoscopy.

115 ct volume were assessed at 24-hour follow-up noncontrast CT or diffusion-weighted MRI.

116 Infarct volume was assessed at 27 hours on noncontrast CT or magnetic resonance imaging (MRI).

117 s presenting with acute chest pain and under noncontrast CT protocol in the emergency department.

118 consistently high performance across various noncontrast CT protocols, achieving a sensitivity of 0.9

119 d cerebral x-ray attenuation measurements at noncontrast CT provide information on the presence of CT

120 Conventional noncontrast CT provides airway and parenchymal measureme

121 or missed diagnoses of AAS in settings where noncontrast CT remains the only feasible initial imaging

122 Diagnostic interventions included noncontrast CT scan of the chest and cytologic examinati

123 large-vessel occlusion and large infarct on noncontrast CT scan, with Alberta Stroke Program Early C

124 nd Methods This retrospective study used 250 noncontrast CT scans acquired between March 2013 and Jun

125 rtunistic screening using 78,593 consecutive noncontrast CT scans from a comprehensive cancer center

126 els were assessed on 1732 annotated baseline noncontrast CT scans obtained from the Tranexamic Acid f

127 Two observers manually delineated ICAC on noncontrast CT scans of 2319 participants (mean age, 69

128 E), and intraventricular hemorrhage (IVH) on noncontrast CT scans of patients with spontaneous ICH.

129 CAC scores from noncontrast CT scans were categorized into low, intermed

130 [SD]; 44 389 men; 41 277 CECT scans; 34 051 noncontrast CT scans), CI-AKI was more likely in patient

131 On noncontrast CT scans, the models achieved a mean AUC of

132 CAC and CCC were measured from noncontrast CT scans.

133 ysis of patients who underwent both IOCM and noncontrast CT studies during the study time frame, were

134 ply automated bone, muscle, and fat tools to noncontrast CT to assess performance for predicting majo

135 (NP-59) and diagnostic accuracy from 0.655 [noncontrast CT using a cut-off attenuation value of > or

136 across levels of ischemic injury defined by noncontrast CT using ASPECTS score and by the volume of

137 Among patients with a large infarct on noncontrast CT within 24 hours, thrombectomy did not dem

138 Conclusion Noncontrast CT x-ray attenuation measurements identify A

139 ficantly, especially in out-of-distribution (noncontrast CT) data.

140 FNA) and combinations of chemical-shift MRI, noncontrast CT, 131I-6beta-iodomethylnorcholesterol (NP-

141 Conclusion Compared with noncontrast CT, CECT was associated with higher odds of

142 fied as infarct hypoattenuation at admission noncontrast CT, modifies the treatment effect of EVT and

143 1001 men had noncontrast CT, of whom 759 had coronary CT angiography.

144 Conclusion At noncontrast CT, published size-dependent conversion fact

145 ness, B = length, C = vertical extension) on noncontrast CT, which we previously demonstrated is comp

146 We compared nongated PET and noncontrast CT, with a modified approach that incorporat

147 d window using a simpler and more widespread noncontrast CT-only paradigm.

148 urs of onset underwent brain MRI followed by noncontrast CT.

149 er adenocarcinomas from benign granulomas at noncontrast CT.

150 ng cancer adenocarcinomas from granulomas at noncontrast CT.

151 s coronary artery calcium (CAC) score, using noncontrast CT.

152 ronary artery calcium score were measured at noncontrast CT.

153 NWU was determined at follow-up noncontrast CT.

154 ion exposures, even with dual-energy virtual noncontrast CT.

155 age, 57 years 8; 65 men) evaluated by using noncontrast CT.

156 ely), when they underwent CECT compared with noncontrast CT.

157 arable to pixel-based manual segmentation on noncontrast CT.

158 2.9) in the late venous phase compared with noncontrast CT.

159 rospective WUS study of patients selected by noncontrast CT.

160 In addition, no data exist for the value of noncontrast CT.

161 d by two neuroradiologists based on baseline noncontrast CTs collected from January 2017 to December

162 simulate contrast enhanced CTA images using noncontrast CTs.

163 omyelitis of the mid- and forefoot underwent noncontrast DECT (80 kV/140 kV) and MRI between October

164 risk assessments including blood samples and noncontrast ECG-gated computed tomography scans.

165 calcium (Ca++) scores were quantitated from noncontrast ECG-gated computed tomography using Agatston

166 51% men) from the Framingham Heart Study, a noncontrast, ECG-gated, 8-slice cardiac multidetector CT

167 uoropropane) in 203 patients with inadequate noncontrast echocardiograms.

168 Although noncontrast electrocardiographically gated cardiac CT is

169 Purpose To evaluate a noncontrast electrocardiographically triggered, navigato

170 Screening included noncontrast electrocardiography-gated computed tomograph

171 ly quantified calcium on VNC images and true noncontrast-enhanced conventional calcium scoring series

172 score with a deep learning (DL) model fusing noncontrast-enhanced CT (NCCT) and clinical information

173 Thirty-six patients prospectively underwent noncontrast-enhanced CT calcium scoring followed by coro

174 etermine whether it can independently screen noncontrast-enhanced head CT examinations and notify the

175 A training and validation dataset of noncontrast-enhanced head CT examinations that comprised

176 s promise for detecting critical findings at noncontrast-enhanced head CT.

177 41 years +/- 12 [SD]; 28 men) who underwent noncontrast-enhanced matrix pencil MRI and lung function

178 an divided by the total LA EAT volume on the noncontrast-enhanced scan (threshold values, -15 HU to -

179 n calcium volumes on the VNC series and true noncontrast-enhanced series on a per-patient (r = 0.94,

180 es closely resembled the profile in the true noncontrast-enhanced series.

181 Contrast-enhanced tumor and noncontrast-enhanced T2 FLAIR signal abnormality volumes

182 Contrast-enhanced tumor volume, noncontrast-enhanced T2 fluid-attenuated inversion recov

183 iate/high-pretest population, integration of noncontrast-enhanced whole-heart MRCA nonsignificantly i

184 (CE) tumors (0.053 +/- 0.029 mL/g/min) than noncontrast-enhancing (NCE) tumors (0.005 +/- 0.002 mL/g

185 %, respectively; P < .001) compared with the noncontrast group (0.1% and 2.7%, respectively; P < .001

186 y higher in the IOCM group compared with the noncontrast group for all CKD subgroups (AKI odds ratios

187 al-enhanced (contrast group) and unenhanced (noncontrast group) abdominal, pelvic, and thoracic compu

188 al-enhanced (contrast group) and unenhanced (noncontrast group) abdominal, pelvic, and thoracic CT sc

189 anol-enhanced (IOCM group) or a noncontrast (noncontrast group) CT examination from January 2003 to D

190 (10 673 in the contrast group, 10 673 in the noncontrast group).

191 different between the contrast group and the noncontrast group.

192 baseline) was compared between contrast and noncontrast groups after propensity score adjustment by

193 significantly different between contrast and noncontrast groups in any risk subgroup after propensity

194 Patients in the contrast and noncontrast groups were compared following propensity sc

195 and mortality were compared between IOCM and noncontrast groups.

196 achnoid hemorrhage is typically diagnosed by noncontrast head computed tomography (CT); lumbar punctu

197 Results of initial noncontrast head CT and CT angiography of the head perfo

198 nd Ischemic lesion net water uptake (NWU) at noncontrast head CT enables quantification of cerebral e

199 A total of 61 704 consecutive noncontrast head CT examinations were retrospectively ev

200 tudy, a primary dataset containing 62 normal noncontrast head CT scans from 62 patients (mean age, 73

201 This local training dataset included 10 699 noncontrast head CT scans in 7469 patients, with ICH stu

202 ethods This was a retrospective study of 491 noncontrast head CT volumes from the CQ500 dataset, in w

203 -for-service cohort, 64% were evaluated with noncontrast head CT, 17% with CT angiography, 3% with CT

204 ong hospitals in the Texas cohort, 100% were noncontrast head CT-performing, 77% CT angiography-perfo

205 lternate diagnoses, improving the utility of noncontrast helical computed tomography as a diagnostic

206 Noncontrast helical computed tomography has rapidly repl

207 d improved sensitivity and specificity using noncontrast helical computed tomography rather than intr

208 Neuroimaging, preferably with noncontrast helical computed tomography, provides excell

209 Noncontrast, high-resolution T2* magnitude and phase sca

210 Scores were similar on true noncontrast images and VNC images at 80 keV for AVC and

211 Conclusion Virtual noncontrast images enabled accurate renal lesion charact

212 thm (PureCalcium) for reconstructing virtual noncontrast images from CCTA specifically for CACS.

213 Conclusion Abdominal virtual noncontrast images from the arterial and portal venous p

214 quantification of AVC, MAC, and CAC on true noncontrast images using Bland-Altman analyses, regressi

215 risk categories determined from VNC and true noncontrast images was assessed by weighted kappa analys

216 VMIs, iodine maps, and virtual noncontrast images were created for a coronary CT angiog

217 Noncontrast images were scored for CAC.

218 Conventional CT images, virtual noncontrast images, and monoenergetic images at 200 and

219 deep learning methods to generate CTAs from noncontrast images, without the need of contrast injecti

220 on and good image quality compared with true noncontrast images.

221 FP sequence as an alternative radiation-free noncontrast imaging modality for use in patients with pu

222 eous [V/S] ratio) measures were derived from noncontrast low-dose abdominal CT scans in a generally h

223 position assessment of lung cancer screening noncontrast low-dose CT of the chest (LDCT) scans, but t

224 ies before and after Fontan completion using noncontrast lymphatic imaging and relate findings with p

225 Short, noncontrast magnetic resonance imaging (MRI) or transrec

226 ic, nutritional, and thyroid conditions; and noncontrast magnetic resonance imaging brain scan.

227 Noncontrast magnetic resonance T1 mapping reflects a com

228 ighlighting the role of clinically available noncontrast "marrow-specific" MRI sequences, which inclu

229 te and chronic myocardial infarction (MI) on noncontrast material-enhanced cine cardiac magnetic reso

230 or hyperattenuating intraluminal contents on noncontrast material-enhanced images (recent hemorrhage)

231 sent was obtained and all patients underwent noncontrast material-enhanced whole-body MR imaging and

232 e the ablation zone directly, is a promising noncontrast method that is robust to treatment-related b

233 ed imaging (DWI) with thermal dosimetry as a noncontrast method to predict ablation margins in indivi

234 y of DWI and ADC mapping combined with other noncontrast MR angiographic (NC-MRA) sequences for detec

235 Keywords: Noncontrast MR Angiography, Low Field, 0.55 T, Obesity,

236 The lifetime incremental cost per QALY for noncontrast MR cholangiopancreatography was $10 311.

237 Results Noncontrast MR cholangiopancreatography was most cost-ef

238 e disease with possible choledocholithiasis: noncontrast MR cholangiopancreatography, contrast materi

239 Results Noncontrast MR imaging followed by cognitively guided MR

240 Noncontrast MR imaging followed by in-gantry MR imaging-

241 y, magnetic resonance angiography (MRA), and noncontrast MRA are each of limited use because of techn

242 ta (53.6 years +/- 10.7; six male) underwent noncontrast MRA scans at both 1.5 T and 0.55 T.

243 Contrast and noncontrast MRI films were scored in a blinded manner, a

244 Noncontrast MRI of the thoracic and lumbar spine (Fig 2)

245 Noncontrast MRI of the thoracic and lumbar spine, MRI of

246 sses the diagnostic performance of DWI-based noncontrast MRI protocols (ncDWI) for the diagnosis of b

247 bdominal aorta and lower abdominal aorta, on noncontrast multidetector computed tomography scans, are

248 Participants also underwent noncontrast multidetector computed tomography to assess

249 Reduced noncontrast myocardial T(1) values are the most sensitiv

250 Noncontrast myocardial T(1) values were substantially lo

251 went an iodixanol-enhanced (IOCM group) or a noncontrast (noncontrast group) CT examination from Janu

252 periaortic fat attenuation (FA) assessed on noncontrast, nongated computed tomography of the descend

253 Lung MR qS0 mapping may be a reliable noncontrast nonradiation alternative to CT in the assess

254 Liver fat fraction was measured on virtual noncontrast PCCT images using spectral processing softwa

255 The HAP and, to a lesser extent, the noncontrast phase provide added value in evaluating carc

256 ons detected by readers 1-4 were as follows: noncontrast phase, 164, 177, 204, and 229 lesions; HAP,

257 x, 28, and six lesions were seen only on the noncontrast phase, HAP, and PVP images, respectively.

258 72, 72, and 62 lesions were best seen on the noncontrast phase, HAP, and PVP images, respectively.

259 ium CT, Photon-Counting Detector CT, Virtual Noncontrast, Plaque Size, Plaque Density Supplemental ma

260 ee-phase (n = 1242) or a dual-energy virtual noncontrast protocol (VNC; n = 149) in 747 patients with

261 selected additional pulse sequences; and (c) noncontrast protocols, where diffusion-weighted imaging

262 from a mean of 2.56 and 2.71 on baseline and noncontrast scans, respectively, to 3.69 after administr

263 ved in patients with degenerative changes on noncontrast scans, while false-negative cases were often

264 Noncontrast studies are adequate to evaluate many condit

265 Noncontrast studies were completed in the normal control

266 sition metrics were extracted from low-dose, noncontrast, supine multidetector abdominal CT scans: to

267 inear relationship between lipid content and noncontrast T(1) values (r=-0.9; P=0.002).

268 We hypothesized that noncontrast T1 mapping by cardiovascular magnetic resona

269 We hypothesized that noncontrast T1 mapping can characterize the myocardium b

270 In HCM and DCM, noncontrast T1 mapping detects underlying disease proces

271 Noncontrast T1 mapping shows potential as a unique and p

272 hods This study is a retrospective review of noncontrast T2-weighted lymphatic imaging performed at T

273 c assessment of postcontrast T1-weighted and noncontrast T2-weighted magnetic resonance imaging (MRI)

274 Lesion visualization was performed using noncontrast (T2-weighted turbo spin echo pulse sequence)

275 3318; aged 48.9+/-10.3 years), who underwent noncontrast thoracic and abdominal multidetector compute

276 Conclusion Noncontrast, three-dimensional, balanced steady-state fr

277 S) for coronary artery disease requires true noncontrast (TNC) CT alongside contrast-enhanced coronar

278 detector (PCD) CT are needed to replace true noncontrast (TNC) scans.

279 be erroneously zero when compared with true noncontrast (TNC)-based CACS.

280 ttenuation and diagnostic quality of virtual noncontrast (VNC) images acquired with photon-counting d

281 rgy (DE) CT allows reconstruction of virtual noncontrast (VNC) images from a single-phase contrast ag

282 impact of plaque size and density on virtual noncontrast (VNC)-based coronary artery calcium scoring

283 ignificance prospectively underwent clinical noncontrast whole-body CT with EID and same-day PCCT.