Neuroradiology 0028-3940

Pappata, S.; Tran Dinh, S.; Baron, J.; Cambon, H.; Syrota, A.

doi: 10.1007/BF00341027pmid: 3493445

234 29 29 1 1 S. Pappata S. Tran Dinh J. C. Baron H. Cambon A. Syrota Départment de Biologie Service Hospitalier Frédéric Joliot CEA Orsay France C.I.E.R.M. Hôpital de Bicêtre Le Kremlin-Bicêtre France Clinique des Maladies du Système Nerveux Hôpital de la Salpétrière Paris France Summary Combined Positron Emission Tomography (PET) and Proton Magnetic Resonance Imaging (MRI) study were performed in six patients with chronic supratentorial stroke to investigate whether remote hypometabolic regions revealed by PET showed any abnormality on MRI. Either regional oxygen consumption ( n =4) or glucose utilization ( n =2) were measured using PET and the 15 O steady state 18 FGD technique, respectively. Four patients, with deeply located brain lesions, showed a significant metabolic reduction in the overlying cerebral cortex. In the remaining two patients, affected by a large cortical infarct, there was a significant crossed cerebellar hypometabolism. The MRI weighted by the parameters spin density (ϱ), spin lattice (T 1 ) and spin-spin (T 2 ) relaxation times were obtained employing various sequences in the same subjects. In no patient did the MRI show any contrast modification in these hypometabolic remote regions, suggesting that subtle loss of tissue and/or biochemical change do not underlie the reduction in metabolic rate.

Hinshaw, D.; Holshouser, B.; Hasso, A.; Thompson, J.

doi: 10.1007/BF00341028pmid: 3822104

234 29 29 1 1 D. B. Hinshaw Jr. B. Holshouser A. N. Hasso J. R. Thompson Section of Magnetic Resonance Sciences, Department of Radiation Sciences, School of Medicine Loma Linda University Loma Linda USA Summary A Siemens 0.5 Tesla Magnetic Resonance Imaging (MRI) system was used with the saddle head coil and transverse scout localization for imaging 10 normal cervical carotid artery bifurcations in the sagittal plane. Good to excellent visualization of the flow voids and vessel contours was accomplished in all cases. Careful technique and patient cooperation are required.

Roosen, N.; Gahlen, D.; Stork, W.; Neuen, E.; Wechsler, W.; Schirmer, M.; Lins, E.; Bock, W.

doi: 10.1007/BF00341029pmid: 3493446

234 29 29 1 1 N. Roosen D. Gahlen W. Stork E. Neuen W. Wechsler M. Schirmer E. Lins W. J. Bock Neurosurgical Clinic Hospital of the University of Düsseldorf Düsseldorf Germany Institute of Roentgenology, Nuclear Medicine, CT and MRI Düsseldorf Germany Department of Neuropathology Hospital of the University of Düsseldorf Düsseldorf Germany Summary Two cases of colloid cyst of the third ventricle are reported. Their computed tomographic (CT), magnetic resonance (MR) and neuropathological features are presented. The MR findings were different in the two cases for reasons not yet fully explained, full biochemical and biophysical analyses of the cyst contents not being available. Neuropathologically, the only significant difference was the abundant presence of cholesterin crystals in the colloid of case 1 and their absence in case 2. One of our cases is also peculiar from a CT point of view, since it was primarily hypodense and did not enhance on intravenous contrast administration.

doi: 10.1007/BF00341030pmid: N/A

Spagnoli, M.; Grossman, R.; Packer, R.; Hackney, D.; Goldberg, H.; Zimmerman, R.; Bilaniuk, L.

doi: 10.1007/BF00341031pmid: 3822096

234 29 29 1 1 M. V. Spagnoli R. I. Grossman R. J. Packer D. B. Hackney H. I. Goldberg R. A. Zimmerman L. T. Bilaniuk Department of Radiology Hospital of the University of Pennsylvania Philadelphia Pennsylvania USA Division of Neurology and Pediatrics Children's Hospital of Philadelphia Philadelphia Pennsylvania USA Department of Neurology and Pediatrics University of Pennsylvania Philadelphia Pennsylvania USA Summary Gliomatosis cerebri is a rare condition characterized by diffuse overgrowth of large portions of the brain and spinal cord by glial cells in varying stages of differentiation. The tumor process is primarily an infiltrative, rather than a destructive one. Hence, pre-operative diagnosis by traditional imaging studies, including computed tomography (CT), has been difficult. Magnetic resonance imaging (MRI), with its unique sensitivity for cerebral pathology, is an ideal modality for demonstrating this lesion. We present three cases of gliomatosis cerebri in which high-field MRI clearly delineates the extent of the pathologic process.

Sartor, K.; Karnaze, M.; Winthrop, J.; Gado, M.; Hodges, F.

doi: 10.1007/BF00341032pmid: 3822097

234 29 29 1 1 K. Sartor M. G. Karnaze J. D. Winthrop M. Gado F. J. Hodges III Mallinckrodt Institute of Radiology, Section of Neuroradiology Washington University School of Medicine St. Louis Missouri USA Summary To determine its diagnostic efficacy in infra-, para- and retrosellar mass lesions magnetic resonance (MR) imaging was compared with computed tomography (CT) in 39 cases. Thirty-six lesions were imaged with a Siemens 0.5 T superconducting unit, three with a 1.5 T unit. CT scanning was performed with third generation equipment. There were 28 neoplasms including eight pituitary adenomas with infrasellar extension, four meningiomas, four extensions from regional malignancies, three chordomas, three juvenile angiofibromas, three medial temporal gliomas, and one each of neuroma, epidermoid and metastasis. Eleven non-neoplastic masses included four vascular anomalies, three cholesterol granulomas, two arachnoid cysts, one sphenoid mucocele and one mixed sclerosing bone dystrophy with masslike thickening of basisphenoid and basiocciput. While MR and CT were equally sensitive (100%), MR was superior in further delineating and characterizing a lesion. MR showed normal or abnormal blood vessels better than CT, and revealed changes of compact bone often quite satisfactorily. Effects on the brain parenchyma or CSF and airspaces were consistently well demonstrated. Provided absence of contraindications MR should be the primary radiologic screening test in suspected mass lesions of above location.

Gillespie, J.; Adams, J.; Isherwood, I.

doi: 10.1007/BF00341033pmid: 3822098

234 29 29 1 1 J. E. Gillespie J. E. Adams I. Isherwood Deparment of Diagnostic Radiology University of Manchester Stopford Building, Oxford Road M13 9PT Manchester UK Department of Radiology Hope Hospital Eccles Old Road M6 8HD Salford UK Summary The purpose of this study was to determine whether diagnostically useful three-dimensional (3D) reformations could be obtained from unmodified high resolution pituitary CT scans. Twelve CT examinations in 9 patients in whom an enhancing tumour or extensive bone destruction was identified around the sella, were studied using 3D images obtained on soft tissue and bone thresholds. 3D images were considered superior to conventional CT sections and reformations for the assessment of the vascular relations of tumours with large supra-sellar components, and in cases of extensive bone erosion. In selected cases, 3D CT imaging may facilitate a faster and more comprehensive appraisal of high resolution CT studies by clarifying otherwise complex spatial relationships.

Karasawa, H.; Tomita, S.; Suzuki, S.

doi: 10.1007/BF00341034pmid: 3822099

234 29 29 1 1 H. Karasawa S. Tomita S. Suzuki Department of Neurosurgery Asahi General Hospital Asahi City Japan Department of Radiology Tokyo Medical and Dental University Tokyo Japan Summary Surgery was undertaken on 32 chronic subdural hematomas in a series of 28 patients who had preoperatively undergone delayed contrast-enhanced computed tomography (DCECT). Timedensity curves on DCECT and iodine concentrations of subdural specimens revealed that chronic subdural hematomas, regardless of density, were significantly enhanced by the entrance of intravascular contrast medium into the interior of hematomas. The ingress of intravascular contrast medium into the interior of the hematomas was chemically proven and might result from a complex transcapillary shift.

Naim-ur-Rahman

doi: 10.1007/BF00341035pmid: 3822100

234 29 29 1 1 Naim-ur-Rahman College of Medicine King Saud University Riyadh Saudi Arabia Summary The computerized tomographic and operative findings in 10 patients with chronic subdural hematoma (SDH) are reviewed. A constant correlation was found between the CT density and the colour of the hematoma evacuated thus enabling an accurate prediction of the colour of fluid one would expect to find at operation. Certain clinical features and CT appearances are highlighted to prevent the likelihood of misdiagnoses.

Tan, C.; Kuan, B.

doi: 10.1007/BF00341036pmid: 3822101

234 29 29 1 1 C. T. Tan B. B. Kuan Department of Medicine University of Malaya Kuala Lumpur Malaysia Department of Radiology Faculty of Medicine University of Malaya Kuala Lumpur Malaysia Summary Twenty adult cases of cryptococcus meningitis and their cranial CT scan findings were reviewed. Ten patients had abnormal CT scans. The findings were hydrocephalus, gyral enhancement, focal nodules, decreased attenuation in the white matter, and patchy increased uptake of contrast. The CT scan appearance often failed to correspond with symptoms. None of the appearances was specific to the cryptococcal infection. Fourteen patients developed papilloedema during the course of the illness. The majority of the patients who developed papilloedema did not have demonstrable hydrocephalus.