摘要:

Three patients with unilateral spondylolysis were evaluated with SPECT and Lumbar CT. All three cases had positive scans. However, the SPECT images were unique to each case. Therefore, the interpretation of the SPECT activity was undertaken in terms of the known natural history of both unilateral and bilateral spondylolysis.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

A Tc-99m bone scan of a patient with classic roentgenographic findings of osteopoikilosis revealed multiple foci of increased activity that corresponded to many of the sclerotic foci on the roentgenograms. The authors presume that the abnormal bone scan in this patient reflects active osseous remodeling, similar to what has been observed in bone islands. Previous reports have emphasized the critical role of the radionuclide bone scan for distinguishing osteopoikilosis from osteoblastic bone metastases in patients with a known or suspected primary malignancy. In a young patient, an abnormal bone scan does not exclude the diagnosis of osteopoikilosis if the roentgenographic findings are characteristic of that entity.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Porous hydroxyapatite spheres are an ideal prosthetic device for orbital implantation because they are incorporated into soft tissues. Once vascularized, an eye prosthesis can be coupled to the sphere by a peg placed within a central motility hole. This hole should not be drilled while the sphere is avascular because of the risk of infection. Radionuclide scanning with Tc-99m methylene diphosphonate has been used to assess implant vascular ingrowth because radiophosphonate deposition within the sphere parallels vascularization. Using this technique, the authors examined the hydroxyapatite implants of 15 patients 6 months following insertion. Results showed that complete vascularization is best defined by planar imaging rather than SPECT. While the relative intensity of implant activity may be an important feature, uniformity of activity is probably more significant.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Markedly increased FDG uptake was noted in a 2-week-old fracture of the clavicle and scapula in a 24-year-old man. This finding emphasizes the need to consider benign etiologies such as trauma for focally increased FDG accumulation in bone.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

The results of CT and bone scintigraphy of eight patients with a histologically proven cystic ameloblastoma of the jaw are reviewed. CT imaging revealed unilocular and multilocular cystic lesions with well-defined thin cystic borders in all patients. CT also detected increased density in the bone marrow adjacent to the cystic radiolucent lesion, suggesting that the ameloblastoma had spread into the cancellous bone. Further, nuclear bone scans showed a doughnut-shaped pattern in all cases and radioactivity beyond the cystic wall, indicating intramedullary extension of the ameloblastoma. The use of these two modalities was found to be complementary in delineating the full nature and extent of the pathologic lesion.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Acute renal failure after exercise with frank pain and patchy renal vasoconstriction is a clinical syndrome that occurs in young, previously healthy persons. The authors describe a 24-year-old man who had this syndrome. CT scan showed wedge-shaped contrast enhancement of both kidneys, which suggested patchy renal vasoconstriction. Tc-99m MDP imaging revealed diffuse increased uptake of both kidneys. After renal function was improved, Tc-99m MDP imaging showed normal uptake of both kidneys. Acute renal failure due to acute tubular necrosis was confirmed by renal biopsy. The authors conclude that Tc-99m MDP may be useful in evaluation of acute renal failure after exercise with flank pain and patchy renal vasoconstriction due to acute tubular necrosis.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Captopril-enhanced renal scintigraphy with Tc-99m DMSA was performed in an 11-year-old boy with hypertension. This showed a significant reduction in function of the right kidney. Renal arteriography was performed and showed two renal arteries on the right, the major one with stenosis. This case illustrates the possible role that scintigraphy with Tc-99m DMSA can play in the diagnosis of renovascular hypertension.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

The authors present a case of renal artery pseudoaneurysm demonstrated on the Tc-99m DTPA dynamic study. On the blood flow image, localized increased activity was noted in the area of the renal hilus. This activity disappeared on the subsequent sequential renal images.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

The authors evaluated the clinical applications of Tc- 99m methoxy isobutyl isonitrile (MIBI) in the simultaneous assessment of ventricular function and myocardial perfusion in patients with congenital heart disease. Global ventricular function was assessed by first-pass ECG gated study. Myocardial perfusion was evaluated on images performed 1 hour after the injection of the tracer. Regional wall motion and systolic thickening were assessed by gated study acquired after the perfusion study. Two young patients were studied after a surgical Glenn procedure. The first patient, with a history of transposition of the great vessels and univentricuiar heart, had an ejection fraction of 44%. The left ventricle was dilated and the right ventricle was not appreciable. The septal and inferoapical regions showed reduced perfusion and reduced systolic thickening. The second patient, with a history of pulmonary atresia, septal defect and left ventricular hypoplasia, had a right ventricular ejection fraction of 37%. Regional wall motion, systolic thickening, and myocardial perfusion were normal. The right ventricle was hypertrophic and larger than the left ventricle. Thus, a single injection of Tc-99m MIBI allows noninvasive simultaneous assessment of global and regional ventricular function and myocardial perfusion in young patients with complicated congenital heart disease

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

A case of a choledochal cyst occurring in a 21-year-old woman is presented. The spectrum of congenital dilatation of the biliary tree and the contributions of various imaging modalities and procedures in the condition are discussed, including the use of nuclear medicine biliary imaging.

ISSN:0363-9762    

出版商:OVID    

年代:1994

数据来源: OVID