(1) With the administration of approximately 37 MBq (26-44 MBq) 201Tl, 5 min acquisition time was possible for SPET imaging, which provided good image quality in all patients.
(2) The cerebral perfusion as visualized from SPET was compared to cerebral angiographies, which showed unilateral filling of intracranial vessels in seven patients.
(3) For planar scanning and SPET without scatter correction there was an overestimate of activity in the source of 290% and 40% respectively.
(4) Single photon emission tomography (SPET) of the calves was also performed in five controls and five patients with PVD.
(5) This technique is easy to apply as an adjunct to SPET and may be helpful in the quantitative evaluation of brain perfusion in routine clinical studies.
(6) The SPET studies with 123I-Iomazenil were carried out 5 min and 2 h after injection.
(7) In 4 out of 6 patients with electroencephalogram (EEG) abnormalities on admittance, SPET revealed at least 2 focal lesions.
(8) Thus, SPET assessment of 99mTc-MIBI uptake tends to underestimate the perfusion contrast between areas with normal and areas with low coronary vasodilatory reserve when compared to PET.
(9) A series of 30 consecutive exercise and redistribution 201Tl SPET studies were centered and reoriented by two operators twice with this method, and twice manually.
(10) In an attempt to improve detection of macroscopically invisible tumour spread, intraoperative scintimetry (IOSM) with a hand-held gamma-probe was performed in addition to SPET 24-30 and 41-48 h after injection of the technetium-99m carcinoembryonic antigen (CEA MoA) on 12 patients with colorectal carcinoma and 3 patients with different neoplastic and inflammatory diseases.
(11) It may be a useful agent for assessment of myocardial viability by single photon emission tomography (SPET) imaging.
(12) The three techniques allowing the noninvasive study of cardiac metabolism, namely magnetic resonance spectroscopy (MRS), positron emission tomography (PET) and single photon emission computed tomography (SPET), all use external detection with stable or radioactive isotopes.
(13) It is hoped that once the scientific basis of a physiopathological study is established using PET, diagnostic information might be provided by the more readily available SPET technology.
(14) Two SPET studies (early and late) were carried out within 45 min after intravenous administration of 200 MBq 123I-IPPA at peak sub-maximal exercise.
(15) The patients were injected with approximately 925 MBq (25 mCi) of 99mTc-LL2 Fab' (1 mg), and planar and single photon emission tomography (SPET) studies were performed at 3-4 h post injection and at 24 h. There was no evidence of thyroid or stomach activity up to 24 h. Uniform splenic uptake was seen in all patients.
(16) SPET improvement demonstrated myocardial salvage earlier than wall motion studies.
(17) Sensitivity of CT compared with SPET became increasingly better in patients with older infarcts (1-18 days).
(18) A metabolic marker for SPET studies is still missing.
(19) Ten patients had focal flow abnormalities with 99mTc-HMPAO SPET.
(20) The activity and the volume of the spheres were calculated from the SPET images and compared with known activities.