Thallium-201 radionuclide myocardial perfusion imaging — Thallium-201 was introduced as a perfusion tracer because of its high (approximately 80 percent) first pass myocardial …
All patients underwent Tl-201 myocardial SPECT/CT and transthoracic two-dimensional (2D) echocardiograph. We compared LVEF assessed by SPECT/CT using …
Although thallium 201 imaging may be of value in detecting viable myocardium if regions with perfusion defects during exercise demonstrate redistribution of thallium on a 3- to 4-hour resting image, thallium defects often appear persistently "fixed" within regions of severely ischemic or hibernating myocardium. ... (as assessed ...
Thallium-201 (Tl-201) is a radiopharmaceutical used for scintigraphy, primarily of the myocardium. The element thallium is treated by the body as an analog of potassium; it is produced in a cyclotron by bombarding thallium-203 with protons.. Characteristics. thallium is a monovalent cation. usually employed in the form of a …
The effects of dopamine on the left ventricular regional wall motion were studied in 11 patients with dilated cardiomyopathy by use of two-dimentional echocardiography and compared with the findings on the uptake of thallium-201. There were no significant changes in heart rate after dopamine infusion (6 micrograms/kg/min).
Patients were assessed by adenosine-stress Tl-201 MPI-IQ-SPECT/CT, and FFR was measured within 4 weeks without a significant intervening event. MPI-IQ …
Prevalence of right ventricular involvement in inferior wall infarction assessed with myocardial imaging with thallium-201 and technetium-99m pyrophosphate Am J Cardiol. 1978 Sep;42(3) :358-62. doi ... 78 consecutive patients with the latter condition were studied with thallium-201 and technethium-99m pyrophosphate myocardial imaging. Right ...
The use of thallium-201 in the preoperative detection of breast cancer: an adjunct to mammography and ultrasonography Eur J Nucl Med. ... status, were analysed for their association with 201Tl uptake by tumour cells. A total of 76 breast lesions were assessed in the study. On final histological diagnosis, there were 56 malignant tumours, 14 ...
The effect of exercise training on myocardial perfusion was assessed using initial and 1-year thallium-201 (Tl-201) exercise studies in 56 patients with stable coronary artery disease (CAD). Subjects had been randomized into a trained group participating in supervised exercise three times per week a …
About. Abstract. Redistribution thallium-201 imaging 2 to 4 h after exercise may be incomplete and therefore may be inadequate to fully assess myocardial …
In our study, we assessed the value of Thallium-201 and Tc-99 m DMSA (V) scintigraphy in distinguishing grade 1 chondrosarcomas from enchondromas as well as grading chondrosarcomas. We secondarily investigated whether there was a role for the combined use of these modalities.
Myocardial perfusion as assessed by thallium-201 scintigraphy during the discontinuation of mechanical ventilation in ventilator-dependent patients ... (47%). Four patients demonstrated new regional decreases of LV myocardial thallium concentration with redistribution of the isotope on delayed images. The patient studied only during SV also …
@article{osti_6964908, title = {Vertical left ventricular angulation assessed by thallium 201 myocardial perfusion imaging in patients with mitral valve prolapse}, author = {Arora, R R and Horowitz, S F and Machac, J and Goldman, M E}, abstractNote = {Mitral valve prolapse has been associated with septal to aortic root angle abnormalities determined by …
To study left and right ventricular perfusion during retrograde and antegrade coronary sinus cardioplegia, we added 0.5 mCi of thallium 201 to 500 ml of hyperkaliemic crystalloid cardioplegic solution injected retrogradely into the coronary sinus at low perfusion pressure (20 to 40 mm Hg) in 14 dogs and antegradely in the ascending aorta in ...
The present study assessed and compared the diagnostic accuracy of thallium-201 (Tl-201) exercise myocardial single photon emission computerised tomography (SPECT) and dobutamine stress echocardiography (DSE) for detection of coronary artery disease (CAD) in patients with left bundle branch block (L …
This imaging technique was initially validated for technetium-99m labeled tracers1,2 and later proved to be technically sufficient for thallium-201 (Tl-201) tracer even though the imaging procedure is limited by the radiation dosimetry with a relatively lower photon count density.3-5 The advantage of Tl-201 gated SPECT has also been underscored ...
Introduction: Thallium-201 is a radionuclide that has previously been used clinically for myocardial perfusion scintigraphy. Although in this role it has now been largely replaced by technetium-99 m radiopharmaceuticals, thallium-201 remains attractive in the context of molecular radionuclide therapy for cancer micrometastases or single circulating tumour …
The migration rate of thallium-201 to the olfactory bulb assessed with SPECT-CT was significantly increased in rats 24 h after the left intranasal administration of thallium-201 and 100 μg rotenone, compared with that in control rats (p = 0.008, 5 rats per group). Our results suggest that thallium-201 migration to the olfactory bulb is ...
U.S. Department of Energy Office of Scientific and Technical Information. Search terms: Advanced search options. ...
Thallium-201 radionuclide myocardial perfusion imaging — Thallium-201 was introduced as a perfusion tracer because of its high (approximately 80 percent) first pass myocardial extraction fraction across physiologic ranges of myocardial blood flow . The myocardial uptake of thallium-201 is a sarcolemmal membrane Na/K ATPase-dependent active ...
It is suggested that anemia was a major determinant of increased myocardial washout rate of Tl-201 in patients with normal myocardIAL perfusion on SPECT. Myocardial perfusion single-photon emission computed tomography (SPECT) is often performed even in patients with suspected coronary artery disease complicated by anemia. We …
THALLIUM-201 IMAGING TO ASSESS MYOCARDIAL VIABILITY. Cellular viability requires intact sarcolemmal function to maintain electrochemical gradients …
Variability of myocardial perfusion defects assessed by thallium-201 scintigraphy in patients with coronary artery disease not amenable to angioplasty or ... High reproducibility of myocardial perfusion defects in patients undergoing serial exercise thallium-201 tomography. Am J Cardiol, 75 (1995), pp. 1116-1119. View PDF View article …
Correlation between thallium-201 myocardial perfusion defects and the functional severity of coronary artery stenosis as assessed by pressure-derived myocardial fractional flow reserve Circ J. 2002 Dec;66 (12):1105-9. ... the FFR exhibited a significant inverse correlation with the (201)Tl reversibility score (r=-0.62; p<0.0001). These results ...
Thallium 201 for assessment of myocardial viability. Left ventricular (LV) performance is reduced in a large subset of patients with chronic coronary artery disease …
Abstract. Uptake of thallium (Tl)-201 in the lungs has been proposed as a measure of left ventricular dysfunction. In this study we were interested in pursuing two goals: (1) to assess possible relationships between the post-exercise Tl-201 lung-heart (LH)-ratio determined from the anterior view during SPECT-acquisition, myocardial ischemia and the extent of …
Thallium-201 myocardial perfusion imaging is being widely used to assess patients with suspected coronary artery disease., Initially after injection of the thallium, regional …
If you have questions about preparing for this test, call your doctor or MyMichigan's Cardiovascular Department at (989) 839-3570. Thallium Stress Test (Thallium 201 Exercise Test) is the same as a treadmill exercise test. This test checks the function of the heart during and after physical activity.
No balloon angioplasty or stent implantation was required because the flow delay in the septal branch disappeared after the intravascular ultrasound procedure. Myocardial perfusion-metabolism mismatch, as assessed by resting thallium-201 and iodine-123-beta-methyl-p-iodophenyl-pentadecanoic acid, was seen in the mid-septal …
The remainder of the abnormalities observed during MV were fixed defects. SV produced significant alterations of myocardial 201 TI distribution or transient LV dilation, or both, in 7 of the 15 patients (47%). Four patients demonstrated new regional decreases of LV myocardial thallium concentration with redistribution of the isotope on delayed ...
