1  to our previous comparison of 99mTc-ECD and 133Xe.

2 the pattern of distribution (ratios) between 133Xe and 99mTc-HMPAO (r = 0.66).

3                          Comparisons between 133Xe and 99mTc-HMPAO were evaluated using a Bonferroni-

4                                Compared with 133Xe and PIOPED criteria, DTPA ventilation and our crit

5 f relative distribution between rCBF ratios (133Xe) and count density ratios (99mTc-HMPAO).

6 ) was found for the comparison between rCBF (133Xe) and derived 99mTc-HMPAO rCBF.

7 widely applied uses 99mTc-MAA for perfusion, 133Xe for ventilation and PIOPED diagnostic criteria.

8 he balloon catheter, approximately 2.5 cc of 133Xe gas was injected to fill the balloon.

9                                              133Xe gas-filled balloon is feasible and effective in th

10                              Localization of 133Xe in the balloon was verified by a gamma camera.

11 zed to global cerebral blood flow (gCBF) for 133Xe or to global count density (gCD) for 99mTc-HMPAO.

12                          rCBF (ml/min/100 g, 133Xe) or regional count density (99mTc-HMPAO) were extr

13                                      A novel 133Xe radioactive gas-filled balloon (3.5/45 mm) was pos

14 ropose a novel system that uses a 133-Xenon (133Xe) radioactive gas-filled balloon catheter system.

15 rived regional cerebral blood flow (rCBF) to 133Xe rCBF ratios and true rCBF (ml/min/100 g), respecti

16 MPAO is linearly related to rCBF measured by 133Xe SPECT, although our data suggest that 99mTc-HMPAO

17                            Immediately after 133Xe SPECT, subjects received 22 +/- 4mCi 99mTc-HMPAO,

18                   CBF was measured by use of 133Xe washout and alpha-stat blood gas management during

19 ral saline) and measurement of ATBF with the 133Xe washout method.