P300 and Xenon Computed Tomography Before and After Intravenous Injection of Acetazolamide

Abstract OBJECTIVE: To determine whether estimates of regional cerebral blood flow (rCBF) using xenon computed tomography (XeCT) in children with moyamoya disease can predict stroke risk before and after treatment. METHOD: Seven patients with moyamoya disease underwent 22 serial Xe computed tomographic scans. Estimates of rCBF were obtained at three computed tomographic levels by use of a 5-minute inhalation of 28% Xe. Acetazolamide challenge was performed in eight scans. For comparison of abnormal vessel distribution and areas of infarction, 17 intra-arterial digital subtraction angiograms, 47 computed tomographic scans, and 15 magnetic resonance imaging scans were available. Follow-up exceeded 36 months in all patients. Mean follow-up for the interventional group was 65.2 months (n =5; range, 37–109 mo) and 38 months for the nonoperative patients (n =2; 36 and 40 mo). RESULTS: Of six Xe computed tomographic scans obtained at diagnosis, four revealed regions of oligemia, augmented vertebrobasilar flow, and regions of carotid steal after acetazolamide. In the delay between diagnosis and treatment, three patients had strokes in ischemic areas identified by XeCT. Of the 10 posttreatment scans obtained from 4 patients, 2 revealed improved tissue perfusion with angiography confirming successful encephaloduroangiomyosynangiosis. In 2 others, XeCT performed 6 months posttreatment revealed improved perfusion without angiographic change, and angiography at 1 year revealed failed encephaloduroangiomyosynangiosis and new native collaterals. None of the patients with improved rCBF had new strokes. Eleven of 14 Xe computed tomographic scans were obtained within 30 days of angiography. Comparison of these studies demonstrates that regions of oligemia were confined to areas associated with vessel stenosis and little neovascularity or collateral pathways. CONCLUSION: XeCT, particularly with acetazolamide challenge, objectively quantifies rCBF. Our preliminary data suggest that it may permit assessment of stroke risk in children with moyamoya disease and may predict surgical outcome earlier than angiography.

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Mid-aortic syndrome: computed tomography angiography depicting extensive collateral circulation in an 11-year-old patient with thoracoabdominal aortic coarctation

VASA ◽

10.1024/0301-1526/a000176 ◽

2012 ◽

Vol 41 (2) ◽

pp. 132-135 ◽

Cited By ~ 2

Author(s):

Krohn ◽

Gebauer ◽

Hübler ◽

Beck

Keyword(s):

Computed Tomography ◽

Computed Tomography Angiography ◽

Collateral Circulation ◽

Intestinal Ischemia ◽

Clinical Presentation ◽

Lower Limbs ◽

Upper Body ◽

Descending Aorta ◽

Before And After ◽

Blood Pressures

The mid-aortic syndrome is an uncommon clinical condition characterized by severe narrowing of the descending aorta, usually with involvement of its renal and visceral branches, presenting with uncontrollably elevated blood pressures of the upper body, renal and cardiac failure, intestinal ischemia, encephalopathy symptoms and claudication of the lower limbs, although clinical presentation is variable. In this article we report the case of an eleven-year-old patient with the initial diagnosis of a mid-aortic syndrome and present the computed tomography angiography pictures and reconstructions before and after surgical therapy.

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Position of the mandibular canal before and after bilateral sagittal split ramus osteotomy: a cone beam computed tomography study

British Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.bjoms.2021.05.001 ◽

2021 ◽

Author(s):

Fernanda Chiguti Yamashita ◽

Lilian Cristina Vessoni Iwaki ◽

Amanda Lury Yamashita ◽

Elen de Souza Tolentino ◽

Vinicius Eduardo de Oliveira Verginio ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Mandibular Canal ◽

Cone Beam ◽

Sagittal Split Ramus Osteotomy ◽

Before And After

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Whole-body 18F-fluorodeoxyglucose positron emission tomography/computed tomography images before and after chemotherapy for Kaposi sarcoma and highly active antiretrovirus therapy

Japanese Journal of Radiology ◽

10.1007/s11604-010-0481-6 ◽

2010 ◽

Vol 28 (10) ◽

pp. 759-762 ◽

Cited By ~ 11

Author(s):

Miyako Morooka ◽

Kimiteru Ito ◽

Kazuo Kubota ◽

Ryogo Minamimoto ◽

Yoshitaka Shida ◽

...

Keyword(s):

Computed Tomography ◽

Kaposi Sarcoma ◽

Emission Tomography ◽

Whole Body ◽

Fluorodeoxyglucose Positron Emission Tomography ◽

Highly Active ◽

Computed Tomography Images ◽

Positron Emission ◽

Before And After ◽

Fluorodeoxyglucose Positron Emission

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Prostate volume measurement by transrectal ultrasound and computed tomography before and after permanent prostate brachytherapy

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/j.ijrobp.2004.04.015 ◽

2004 ◽

Vol 60 (3) ◽

pp. 767-776 ◽

Cited By ~ 19

Author(s):

Matthew C. Solhjem ◽

Brian J. Davis ◽

Thomas M. Pisansky ◽

Torrence M. Wilson ◽

Lance A. Mynderse ◽

...

Keyword(s):

Computed Tomography ◽

Prostate Volume ◽

Transrectal Ultrasound ◽

Volume Measurement ◽

Prostate Brachytherapy ◽

Before And After

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Computed Tomography and Bronchoscopy in Endobronchial Tuberculosis

Canadian Respiratory Journal ◽

10.1155/2003/496296 ◽

2003 ◽

Vol 10 (8) ◽

pp. 445-448 ◽

Cited By ~ 11

Author(s):

Halil Yanardag ◽

Cüneyt Tetikkurt ◽

Seza Tetikkurt ◽

Sabriye Demirci ◽

Tuncer Karayel

Keyword(s):

Computed Tomography ◽

Retrospective Study ◽

Therapeutic Response ◽

Histopathological Examination ◽

Computed Tomographic ◽

Before And After ◽

Endobronchial Tuberculosis ◽

Age Range

BACKGROUND: The therapeutic response to endobronchial tuberculosis is usually evaluated by bronchoscopy. Currently, there are no published studies investigating the use of computed tomography for the evaluation of therapeutic response in endobronchial tuberculosis.OBJECTIVE: A retrospective study was performed to evaluate the bronchoscopic and computed tomographic features of endobronchial tuberculosis before and after treatment. The aim of this study was to investigate the usefulness of computed tomography for the assessment of treatment.METHODS: The clinical, pathological and bronchoscopic features of endobronchial tuberculosis were evaluated in 55 patients. The age range of the patients was 21 to 52 years. Computed tomography and bronchoscopy were performed before and after treatment.RESULTS: Diagnosis of tuberculosis was confirmed by culture and histopathological examination. Bronchoscopic examination revealed 89 endobronchial lesions of various types in 55 patients. The exudative type was the most common. Follow-up bronchoscopy revealed that exudative-, ulcerative- and granular-type lesions healed completely. Computed tomography performed after treatment correlated well with the follow-up bronchoscopic findings.CONCLUSION: The results suggest that follow-up computed tomography is useful for the evaluation of therapeutic response and complications associated with endobronchial tuberculosis, and may replace bronchoscopy.

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Xenon computed tomography measuring cerebral blood flow in the determination of brain death in children

Annals of Neurology ◽

10.1002/ana.410250603 ◽

1989 ◽

Vol 25 (6) ◽

pp. 539-546 ◽

Cited By ~ 36

Author(s):

Stephen Ashwal ◽

Sanford Schneider ◽

Joseph Thompson

Keyword(s):

Computed Tomography ◽

Blood Flow ◽

Cerebral Blood Flow ◽

Brain Death ◽

Xenon Computed Tomography

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A report on an acute, in-hours, outpatient review clinic with ultrasonography facilities for the early evaluation of general surgical patients

Annals of The Royal College of Surgeons of England ◽

10.1308/rcsann.2016.0164 ◽

2016 ◽

Vol 98 (7) ◽

pp. 468-474 ◽

Cited By ~ 3

Author(s):

TE Pidgeon ◽

U Shariff ◽

F Devine ◽

V Menon

Keyword(s):

Computed Tomography ◽

Primary Outcome ◽

Surgical Patients ◽

Clinic Attendance ◽

Early Evaluation ◽

Admission Rates ◽

Before And After ◽

Age Range ◽

Surgical Clinic

Introduction In 2013 our hospital introduced an in-hours, consultant-led, outpatient acute surgical clinic (ASC) for emergency general surgical patients. In 2014 this clinic was equipped with a dedicated ultrasonography service. This prospective cohort study evaluated this service before and after the introduction of ultrasonography facilities. Methods Data were recorded prospectively for all patients attending the clinic during 2013 and 2014. The primary outcome was patient destination (whether there was follow-up/admission) after clinic attendance. Results The ASC reviewed patients with a wide age range and array of general surgical complaints. In 2013, 186 patients attended the ASC. After the introduction of the ultrasonography service in 2014, 304 patients attended. In 2014, there was a reduction in the proportion of patients admitted to hospital from the clinic (18.3% vs 8.9%, p=0.002). However, the proportion of patients discharged after ASC review remained comparable with 2013 (30.1% in 2013 vs 38.8% in 2014, p=0.051). The proportion of patients undergoing computed tomography (CT) scans also fell (14.0% vs 4.9%, p<0.001). Conclusions The ASC assessed a wide array of general surgical complaints. Only a small proportion required hospital admission. The introduction of an ultrasonography service was associated with a further reduction in admission rates and computed tomography.

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