摘要:

The left ventricular cavity seen on a stress thallium scan is normally smaller than that on a non-stress scan. This size differential can be used as an adjunct in the interpretation of borderline relative changes in perfusion seen in coronary artery disease or in the elimination of some false-negatives secondary to balanced lesions.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

A total of 19 patients had myocardial perfusion imaging with thallium-201 thallous chloride (Tl-201) immediately after maximal treadmill exercise and 4–6 hours later (redistribution). They also were given rest–stress EKGs and coronary angiograms as part of an evaluation of coronary artery disease. Twenty-six defects were seen on initial postexercise scans in the 19 patients. Of these, 20 were in the region of noninfarcted myocardium and six were in zones of previous myocardial infarction (diagnosis based on the resting EKG). Of the 20 defects in noninfarcted myocardium, 12 were associated with significant obstruction (> 75%) of regional coronary vessels. The remaining eight had normal coronary arteries or ≤ 75% occlusion. Of the 12 defects with significant disease of coronary vessels, eight showed redistribution of Tl-201; there were functional collaterals to the involved vessels in all of these defects. Of the six defects in the region of prior myocardial infarction, no redistribution of Tl-201 was seen in five (one showed only partial redistribution). In this group, the incidence of collateral circulation was similar to that in noninfarcted myocardial cases. A significant association exists between redistribution of Tl-201 and absence of severe obstruction, or the presence of vessel disease, but with functional collaterals to the involved areas in patients with transient myocardial ischemia. Collaterals do not appear to influence redistribution of Tl-201 in zones of myocardial infarction.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

Three cases with photopenic lesions on bone scintigraphy due to metastases from osteogenic sarcoma are presented.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

The authors report an unusually severe case of calcinosis universalis with prominent bone scan findings.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

Abnormal increased renal accumulation of Tc-99m- MDP was observed in a patient found subsequently to have stenosis of the ipsilateral renal artery. The case is both interesting in itself and for its possible implications regarding the use of radiolabeled phosphates in renal ischemia.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

A case of cerebral infarction that showed a disparity between Tc-99m-pertechnetate and Tc-99m-EHDP brain images is presented. Serial Tc-99m-pertechnetate and Tc-99m-EHDP brain images showed not only different lesion-to-nonlesion ratios but different distribution patterns. Tc-99m-labeled phosphate compounds may be useful in the estimation of prognosis in cerebral infarction as well as in differential diagnosis between cerebral infarction and cerebral tumors.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID

摘要:

A case report of false-positive renal imaging due to anterior displacements of the upper pole of the left kidney with the patient in the prone position is presented. False imaging can be avoided by imaging the kidneys with the patient in the supine position and with the detector the patient.

ISSN:0363-9762    

出版商:OVID    

年代:1980

数据来源: OVID