ライフサイエンスコーパス: counting rate

1 GO) systems were operated well below nominal counting rates.

2 the efficacy of the method as a function of counting rates.

3 ate may be an important determinant of tumor counting rates.

4 wide range of isotope activities and scanner counting rates.

5 -equivalent counting rate, scatter fraction, counting rate accuracy, and image quality were character

6 The peak counting rate after a 12-mCi injection is approximately

7 to deadtime effects, we measure a peak true counting rate, after scatter and randoms subtraction, of

8 /MR imaging of at least 50% according to the counting rate analysis.

9 e systems, (177)Lu increased the coincidence counting rate and slightly affected the spatial resoluti

10 )Tc or (177)Lu, we evaluated the coincidence counting rate and spatial resolution when both a PET and

11 From patient data, noise-equivalent counting rates and the singles-to-trues ratio (a surroga

12 eform, iapp(t), for ensuring true stochastic counting rates and to improve detection sensitivity (i.e

13 rmance when spatial resolution, sensitivity, counting rate, and image quality along with a low cost a

14 amera has excellent resolution, sensitivity, counting rate, and imaging performance.

15 cps singles and 4-14 Mcps prompt coincidence counting rates, and 2%-10% on the investigated scanners.

16 dy weight, peak dead-time correction factor, counting rates, and residual scatter bias for accurate c

17 0% bias, from which corresponding dead-time, counting rates, and/or injected activity limits were est

18 Spatial resolution, sensitivity, counting rate capabilities, and image quality parameters

19 Spatial resolution, sensitivity, counting rate capabilities, and image quality were evalu

20 resolution, sensitivity, axial coverage, and counting-rate capabilities.

21 a high-sensitivity scanner design with good counting rate capability due to the reduced light spread

22 The counting rate could be corrected to a high degree on one

23 e scanner collected data at near its maximal counting rate for either 1480-MBq 2D or 37-MBq 3D acquis

24 asts trend toward increased noise-equivalent counting rates for all other things equal.

25 ties of (99m)Tc deteriorated the coincidence counting rate from the (18)F-filled phantom and the (22)

26 l resolution, scatter fraction, sensitivity, counting rate, image quality, and accuracy as defined by

27 Despite the limited counting rate imposed by the readout electronics, we sho

28 ary bladder) as well as the noise-equivalent counting rates in each bed position.

29 , a high correlation between the radioactive counting rates in the sentinel nodes of both scintigraph

30 the same cylinder, the peak noise equivalent counting rate is 60 kcps at an activity concentration of

31 Because the data collection was counting rate limited in either mode, and there are more

32 The system becomes counting-rate limited as the activity is increased, but

33 mote GM detector system to confirm accuracy, counting rate linearity and reliability of data transfer

34 Counting rate linearity was established up to 350 MBq in

35 We measured spatial resolution, uniformity, counting- rate linearity, recovery coefficients, and qua

36 Counting rate maps of iron gamma-rays show a surface iro

37 or gamma-ray spectrometer spectra along with counting rate maps of thorium, potassium, and iron delin

38 Rq(t), where P c(t) and Bc(t) represent the counting rates measured in ROI placed over the left vent

39 tions may be scaled directly to the specific counting rates measured on a clinical scan, thereby yiel

40 Additional counting rate measurements with a large phantom were per

41 SPECT scan together with multiple whole-body counting-rate measurements and serum activity-concentrat

42 At these counting rates, multiple pileup events (> or = 3 events

43 Noise-equivalent counting rate (NECR) versus A(0) curves and the optimal

44 dual patient scans, such as noise-equivalent counting rate (NECR).

45 The maximum noise equivalent counting rate obtained with a 6.4-cm diameter cylinder s

46 The maximum noise-equivalent counting rate of 19.5 and 22.7 kcps for tight and loose

47 ic fields were associated with unusually low counting rates of >0.5 mega-electron volt per nuclear pa

48 to study the impact of pulse pileup at high counting rates on timing, as well as energy and spatial,

49 The noise-equivalent counting rate peak was 124 kcps at 9.1 kBq/cm(3) The sca

50 ximum standardized uptake value from PET and counting rate per area on the CL imaging was established

51 action, sensitivity, spatial resolution, and counting rate performance of the scanner.

52 ermine the sensitivity, scatter fraction and counting rate performance of the system.

53 intrinsic scatter fraction, sensitivity, and counting rate performance, a 70-cm line source is now sp

54 on, intrinsic scatter fraction, sensitivity, counting rate performance, and accuracy of count loss an

55 olution, image quality, scatter fraction and counting rate performance, and image quality were obtain

56 tion, system sensitivity, energy resolution, counting rate performance, scatter fraction, spillover r

57 l performance, with improved sensitivity and counting rate performance.

58 s prototype system (resolution, sensitivity, counting-rate performance and scatter fraction) opens up

59 a brain scanner (e.g., scatter fraction and counting-rate performance measurements).

60 solution, sensitivity, scatter fraction, and counting-rate performance were evaluated.

61 hen obtained with a PET system having a high counting-rate performance, 2D and 3D (82)Rb PET cardiac

62 The data included spatial resolution, counting-rate performance, scatter fraction, sensitivity

63 g resolution, as well as its sensitivity and counting-rate performance.

64 MAG3 (1995), the peak time and the ratio of counting rate (R) at 20 min to that at 3 min (R20:3) wer

65 al resolution, sensitivity, noise-equivalent counting rate, scatter fraction, counting rate accuracy,

66 ing there were small differences in measured counting rate sensitivity (4.9%) and lesion contrast (8.

67 NU01 peak 2D (3D) noise equivalent counting rate (T(2)/[T + R + S]) was 90.2 (67.8) kilocou

68 tionship between Cp and the average particle counting rate (tauavg(-1)).

69 nding to specific patient scans much as if a counting-rate test had been performed on each patient.

70 ger decrease of SUVmean and noise-equivalent counting rates than regions in the upper abdomen (SUVmea

71 e implemented to further improve the imaging counting rates that we have shown by multiple times.

72 The ratio of initial counting rate to administered dose is used to estimate r

73 d spheres was also measured as a function of counting rate to evaluate different techniques for rando

74 with conventional XANES resulting in higher counting rates to reliably evaluate the iron oxidation s

75 The maximum noise-equivalent counting rate was 1,100 at 57 MBq for the mouselike phan

76 -ns timing window, the peak noise equivalent counting rate was 1,670 kcps at 130 MBq for the mouse-si

77 e ratlike phantom, the peak noise-equivalent counting rate was 14 kcps on the MiniPET-2 but 24 kcps o

78 The averaged peak noise-equivalent counting rate was 193.4 kcps at 21.9 kBq/mL, with a scat

79 7.3% and 34.0%, and maximum noise-equivalent counting rate was 406 and 119 kcps in the mouselike and

80 Random estimation from singles counting rate was applied to all relevant analysis.

81 The camera resolution at postinjection counting rates was 11.7% full width at half maximum (FWH

82 esolution, sensitivity, and noise-equivalent counting rate were measured based on the National Electr

83 The maximum noise equivalent counting rates were 430 kcps at 36 MBq and 130 kcps at 2

84 Near-nominal counting rates were obtained for the NaI systems, and th

85 eclinical PET systems, unable to handle high counting rates, will have count losses and may also intr