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1. |
Provocative Red Blood Cell Scintiscan in Occult Chronic Gastrointestinal Hemorrhage |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 945-948
RICHARD BAKALAR,
PAUL TOURIGNY,
EUGENE SILVERMAN,
RUSSELL SCHUB,
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摘要:
A patient with a chronic occult gastrointestinal bleeding site is described. Because an extensive examination failed to locate the site of bleeding, a heparin infusion was used in conjunction with a conventional Tc-99m labeled red cell bleeding study. A mid-jejunal ulcer was safely localized before elective surgery. A protocol for a heparin provocative bleeding study is proposed.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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2. |
Clinical Value of Labeled Red Blood Cell Scintigraphy in Patients With Difficult to Diagnose Gastrointestinal Bleeding |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 949-952
JOSEPH VAN GEELEN,
ELLY DE GRAAF,
WIM BRONSVELD,
ROBBERT BOER,
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摘要:
A retrospective study was conducted using 36 patients with gastrointestinal bleeding in whom the diagnosis was not directly apparent from first line diagnostic procedures. Final diagnosis was established by surgery, endoscopy, or postmortem examination in 20 patients. Scintigraphic examination with Tc-99m or in-111 labeled red blood cells yielded 24 positive and 18 negative results. Nine out of 13 positive scans (verified by other diagnostic procedures) accurately identified the site of bleeding. This was considered to be a satisfactory result in this group of difficult to diagnose patients. The lowest success rate was observed in patients taking drugs that interfered with coagulation, or in patients prone to diffuse blood loss because of coagulopathy. Late scans did not offer additional information and the use of in-111 for this purpose was not thought to be of benefit. Although the technique is rather noninvasive and simple, its application should be restricted to selected patients and its interpretation related to the results of other investigations.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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3. |
The Interrenicular Septum A Normal Anatomical Variant Seen on DMSA SPECT |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 953-955
MONICA ROSSLEIGH,
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摘要:
SPECT imaging has been shown to identify additional defects when applied to Tc-99m DMSA scintigraphy. However, the nature of these defects is uncertain. They may be because of small scars or anatomical variants. The interrenicular septum (IRS) is a normal finding that may mimic a scar on ultrasound examination or tomography. In this study, it was found that the IRS may be identified on Tc-99m DMSA SPECT and that it was present in 32% of patients. Its characteristic appearance is a linear area of absent tracer uptake extending from the renal hilum into the parenchyma, usually anterosuperiorly. The preservation of renal cortical uptake differentiates it from a scar, which results in a defect in the rim of cortical Tc-99m DMSA accumulation.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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4. |
Reverse Redistribution in TI‐201 Stress‐Redistribution Myocardial ScintigraphyEffect of Rest Reinjection |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 956-961
LEONARDO PACE,
ALBERTO CUOCOLO,
EMANUELE NICOLAI,
MASSIMO IMBRIACO,
SIMONE MAUREA,
ANTONIO NAPPI,
BRUNO RICCIARDELLI,
MARCO SALVATORE,
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摘要:
To clarify the clinical significance of TI-201 reverse redistribution (RR), 33 patients with chronic coronary artery disease (CAD) underwent stress-redistribution TI-201 cardiac imaging with rest reinjection, coronary arteriography, and 2D-echocardiography. Rest Tc-99m MIBI scintigraphy was also performed in 27 of the 33 patients. A total of 495 segments were analyzed for TI-201 scintigraphy (405 for Tc-99m MIBI). Each segment was assigned to one of the major coronary artery territories. Two patterns of RR were identified; 1) pattern A (RR-A) showed normal TI-201 uptake on stress images and lower than normal on redistribution images, and 2) pattern B (RR-B) showed lower than normal TI-201 uptake on stress images with further decrease on redistribution images. The RR phenomenon was found in 46 (9% of the total) segments; 25 with RR-A and 21 with RR-B. Reverse redistribution pattern A segments had lower Tc-99m MIBI uptake (84 ± 9% versus 92 ± 10%,P< 0.0001) and a higher percentage of stenosed coronary arteries (80% versus 49%,P< 0.05) compared to normal segments (n = 204, 41% of the total). No difference in wall motion was observed between RR-A and normal segments. Of the 25 segments with RR-A, 14 showed enhanced TI-201 uptake after reinjection (Re+) and 11 remained unchanged after reinjection (Re–). Segments that were Re– showed significantly (P< 0.05) lower Tc-99m MIBI uptake (79 ± 9%) compared to Re+ segments (87 ± 8%) and normal segments (92 ± 10%). No difference in wall motion was observed between Re+ and Re– segments. Normal and Re+ segments did not differ significantly in any of the variables considered. Reverse redistribution-pattern B segments did not significantly differ from those with reversible or irreversible TI-201 defects. These data suggests that in patients with chronic CAD segments with normal TI-201 uptake on stress images and decreased TI-201 uptake on redistribution images should not be considered normal segments. Thallium-201 reinjection at rest appears to be able to further stratify these segments, identifying those with enhanced TI-201 uptake after reinjection that show myocardial perfusion and coronary anatomy similar to normal segments.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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5. |
Discordance of Dual‐Isotope (Hybrid) Myocardial Perfusion Imaging Results in Patients Who Have Undergone Revascularization Procedures |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 962-967
LEONARD CONNOLLY,
THOMAS HILL,
MYLAN COHEN,
ANDREW BURGER,
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摘要:
Three hundred twenty-one separate acquisition dual-isotope myocardial perfusion scans were reviewed retrospectively. Studies performed in six patients demonstrated a relative improvement in Tc-99m sestamibi uptake during stress in segments that appeared abnormal on rest injected TI-201 images. All patients who demonstrated this pattern had a prior history of myocardial infarction and interventional revascularization. While many factors may contribute to this appearance, the authors favor the presence of a patent infarct-related artery as being the most significant.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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6. |
Abnormal Sympathetic Innervation of the Heart in a Patient With Myotonic Dystrophy Detected With I‐123 MIBG Cardiac SPECT |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 968-972
KIKUO MACHIDA,
NORINARI HONDA,
TOSHIO MAMIYA,
TAKU TAKAHASHI,
TSUYOSHI KAMANO,
AKIO KASHIMADA,
YUHSUKE INOUE,
MASAO KINOSHITA,
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摘要:
Iodine-123 MIBG is a norepinephrine analog which can be used to image the sympathetic innervation of the heart. The authors report a patient with myotonic dystrophy whose I-123 MIBG SPECT revealed accelerated washout of I-123 MIBG from infero-posterior and a part of lateral wall, although TI-201 SPECT showed no abnormal finding. The authors conclude that I-123 MIBG can be more sensitive in detecting the cardiac abnormality than TI-201 SPECT in this disease.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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7. |
Induced Right‐to‐Left Cardiac Shunt During Pulmonary Perfusion Imaging |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 973-974
JOHN REES,
JOHN SZIKLAS,
RICHARD SPENCER,
GANGADHAR CHALASANI,
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摘要:
Ventilation-perfusion lung scans are routinely performed using Tc-99m labeled MAA particles administered intravenously which are subsequently trapped in the pulmonary artery capillary bed. In the presence of a right-to-left shunt, activity may be seen in the systemic circulation. Right-to-left shunts may be worsened by inducing hypoxemia which causes pulmonary artery constriction, and also by increasing venous return to the heart. In this case, the authors used various maneuvers to increase right-to-left shunting and thereby demonstrated the presence of fixed pulmonary hypertension. These findings suggested that the patient's dyspnea on exertion was not primarily because of left ventricular dysfunction, and proposed coronary bypass surgery was deferred for medical management.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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8. |
Resting TI‐201 Scintigraphy in the Evaluation of Coronary Artery Disease in Children With Hurler Syndrome |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 975-978
RENE du CRET,
ERIC WEINBERG,
CHRISTOPHER JACKSON,
ELIZABETH BRAUNLIN,
ROBERT BOUDREAU,
CHRISTOPHER KUNI,
BECKY CARPENTER,
DAVID HUNTER,
WILLIAM KRIVIT,
GEOFFREY BODEAU,
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摘要:
Severe coronary artery disease may occur early in the course of mucopolysaccharidosis. The authors present radiologic, scintigraphic, and pathologic findings in five patients with Hurler syndrome. Thallium-201 myocardial scintigraphy and selective coronary angiography obtained within 2 days to 6 months were correlated in five patients. Postmortem examination of the coronary arterles was obtained in one patient within hours of angiography. Interobserver agreement on grading of scintigraphic abnormalities was poor. Nonspecific findings on TI-201 studies included septal abnormalities in all five patients. Scintigraphic findings were corroborated by angiography and postmortem results in only 3 of 5 patients. Our findings suggest that resting TI-201 scintigraphy has limited value in the detection of coronary artery disease in patients with Hurler syndrome.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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9. |
Difference Between Splenic Volume Measured at Necropsy and That Measured in Vivo by Radionuclide Tomography |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 979-980
ANTON OTTO,
ESTELLE NINHAM,
P. PRETORIUS,
LEON WAGNER,
D. RHONDA du TOIT,
ROBERT SCHALL,
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摘要:
Reference values for splenic volume used in this study are based on necropsy measurements made in 1970. Because the volumes (measured by radionuclide tomography) seemed to be consistently greater than the necropsy values, the splenic volume in 35 healthy male volunteers ranging in age from 18–30 years (median age, 21 years) was studied. Their mean (SD) splenic volume was 281 (73) ml compared with 138 (34) ml in the reference group. The mean splenic volume in healthy volunteers seems to be significantly greater than in cadavers, and these results suggest that reference range for splenic volume in vivo should be revised.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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10. |
Meperidine in Conjunction With Cholescintigraphy to Diagnose Acute Cholecystitis in a Patient Allergic to Morphine |
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Clinical Nuclear Medicine,
Volume 19,
Issue 11,
1994,
Page 981-984
WEI-JEN SHIH,
JANICE FONG,
MARY GORA,
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摘要:
Cholescintigraphy with morphine augmentation is used routinely to expedite the differential diagnosis of acute from chronic cholecystitis. A patient with hepatic dysfunction and an allergy to morphine received intravenous meperidine in conjunction with cholescintigraphy. The gallbladder was not visualized 30 minutes after administration of the drug. However, the activity accumulated in the initial photon deficient gallbladder at 4 hours after meperidine administration (6.5 hours after radiopharmaceutical administration.) These findings may be explained in part by prolongation of meperidine bioavailability because of impairment of hepatic function.
ISSN:0363-9762
出版商:OVID
年代:1994
数据来源: OVID
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