摘要:

A 47-year-old man with chronic renal failure underwent renal transplantation. He remained anuric and was diagnosed with an intraperitoneal urine leak by Tc-99m MAG3 renal scintigraphy. The diagnosis was confirmed by imaging fluid withdrawn via the peritoneal dialysis catheter.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

The diagnostic problems in a clinically asymptomatic patient with a previously unknown ectopic single kidney in the pelvis and the diagnostic utility of three-dimensional surface rendering of Tc-99m DMSA SPECT for delineating ectopic functional renal parenchyma are reported. Inconclusive dynamic planar Tc-99m MAG3 renal scintigraphy was performed with the field of view centered at the upper abdomen. Twenty-four hours later, static planar Tc-99m DMSA scintigraphy 3 hours after injection delineated functional renal parenchyma only in the pelvis but did not reveal the shape of the organ. Three-dimensional surface rendering exposed a single ectopic kidney in the pelvis. This case is the first description of the advantages of three-dimensional surface rendering of Tc-99m SPECT in the diagnosis of an ectopic kidney.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

The role of biliary excretion in Tc-99m ethylenedicysteine (EC) renal imaging was studied. Of 2,215 dynamic renal studies performed with Tc-99m EC, only nine cases of gallbladder visualizations and/or biliary excretion were identified. In no case did biliary excretion affect the interpretation of the renal study.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Varicocele, a varicosity of the gonadal venous plexus, is a well-recognized disorder occurring in up to 10% of men. In women, an analogous varicosity of the salpingo-ovarian plexus is rare. This may be explained, in part, by the lack of obvious findings on clinical examination in women compared with men and the need, until recently, to use invasive venographic methods to confirm the diagnosis. Two cases of "female varicocele" diagnosed by means of echo Doppler and Tc-99m red blood cell scintigraphy and their cure by percutaneous phlebographic occlusion of the ovarian venous varicosity are described.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Posttraumatic osteomyelitis was investigated in 23 patients using nuclear medicine techniques. Tc-99m hexamethylpropilene amine oxime (HMPAO)-labeled leukocyte scintigraphy was performed in 11 patients, and Tc-99m nanocolloid scanning was performed in the other 12 patients. The scintigraphic findings were compared with clinical, laboratory, radiologic, and bacteriologic results. The findings on leukocyte imaging were consistent with the clinical symptoms in 7 of 11 patients, with the laboratory pattern in 7 of 10 patients, with the radiologic findings in 7 of 11 patients, and with the results of bacteriology in 6 of 7 patients. The findings on nanocolloid scintigraphy corresponded with the clinical symptoms in 9 of 12 patients, with the laboratory pattern in 8 of 10 patients, with the radiologic findings in 8 of 12 patients, and with the bacteriology in 4 of 5 patients. The results suggest that both methods were of similar value for the detection of chronic posttraumatic osteomyelitis regardless of whether the process was active. Conversely, on the basis of semiquantitative analysis of the images, leukocyte scintigraphy seemed to characterize the grade of inflammation better than did nanocolloid scintigraphy.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Chyluria is a urologic manifestation of a lymphatic system disease abnormality and leads to nutritional deficiency. The case of a patient with chyluria is presented, and the results of lymphoscintigraphy with those of contrast lymphangiography are compared. Lymphoscintigraphy very clearly showed the site of the fistulae and was as precise as lymphangiography. Follow-up lymphoscintigraphy 2 months after therapy revealed no radionuclide accumulation. Lymphoscintigraphy is a useful, noninvasive, safe, and simple technique for the diagnosis and follow-up of chyluria.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Several radionuclide imaging agents have been used for assessing the presence of myocardial viability. These include Tl-201 chloride, Tc-99m sestamibi, and Tc-99m teboroxime. Currently, the most reliable indicator is F-18 FDG, which accumulates in severely hypoperfused myocardium, indicating preserved metabolic activity. The presence of chronically ischemic myocardium that has preserved metabolic activity is referred to as "hibernating" myocardium. In this series, the ability of Tl-201, sestamibi, and teboroxime to establish the existence of viable myocardium was compared with that of F-18 FDG. Seventy-seven patients with ischemic cardiomyopathy were referred for determination of myocardial viability. FDG images were compared with representative resting blood-flow images obtained from either: 1) 24 hour Tl-201 reinjection-redistribution images, 2) resting sestamibi blood-flow images, or 3) early images from resting teboroxime washout analysis. Tl-201 was found to underestimate myocardial viability in 41% of patients, Tc-99m sestamibi underestimated viability in 38% of patients, and Tc-99m teboroxime underestimated viability in 26% of patients. There was no significant difference in the prediction of viable myocardium among the three radiopharmaceuticals, as all three underestimated myocardial viability.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

A case is presented of metastatic tumor causing Jacod's syndrome: total ophthalmoplegia, blindness, and trigeminal neuralgia. Abnormal soft tissue invading the orbital apex, anterior clinoid process, and cavernous sinus was difficult to assess by CT and MRI, but dual-isotope SPECT including Tc-99m. HMDP bone imaging and TI-201 tumor imaging strongly suggested that the cause of this rare syndrome was a small metastatic tumor. Although the therapeutic effect was also difficult to assess by anatomic imaging alone, dual-isotope SPECT after radiation therapy showed a decline of tumor viability.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Intracranial metaiodobenzylguanidine (MIBG) uptake is occasionally and only faintly visualized on diagnostic studies. Recently, intense normal cerebellar uptake was described on posttherapy MIBG images. Experience at the University of Michigan with posttherapy MIBG scintigraphy of pheochromocytoma was reviewed. The patterns and correlates of intracranial uptake after therapeutic I-131 MIBG in 25 patients (61 patient treatment encounters) were evaluated by review of records and blinded consensus interpretation of diagnostic and posttherapeutic MIBG scans. Thirty-nine (64%) patient treatment encounters demonstrated at least faint (grade 1) MIBG uptake in one or more brain sites; the most common site was the cerebellum. There was a statistically significant relation between intracranial uptake and 1) size of therapeutic dose and 2) patient age, but no relation between intracranial uptake and gender, body mass index, plasma epinephrine level, plasma norepinephrine level, urine metanephrine level, or the therapy-to-imaging interval. Although the influence of age on the pattern and intensity of intracranial uptake is unexplained, the relation to therapy dose may be explained by the possible generation of MIBG metabolites that can cross the blood-brain barrier (high activity administered and the delay until imaging). Further studies are needed to define mechanisms of intracranial uptake and relation to responses and toxicity after MIBG therapy of neuroendocrine tumors.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Examples of Ga-67 and Tl-201 scans in AIDS patients performed at St. Vincent's Hospital and Medical Center of New York are presented. Use of these methods is the adopted approach at this institution in AIDS patients for localizing sites of tumor or infection involvement. A Ga-67 scan is the most common nuclear medicine examination performed on AIDS patients. Sequential TI-201 and Ga-67 scans have a role in differentiating Kaposi's sarcoma from malignant lymphoma and opportunistic infections. For intracranial lesions, Tc-99m MIBI or Tl-201-201-201-201 chloride can differentiate malignant from benign inflammatory lesions.

ISSN:0363-9762    

出版商:OVID    

年代:1998

数据来源: OVID