Computerized radiology : official journal of the Computerized Tomography Society最新文献_第5页

Computed tomography of pulmonary endometriosis 肺子宫内膜异位症的计算机断层扫描

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-03-01 DOI: 10.1016/0730-4862(87)90015-1

Yancu Hertzanu , Dov Heimer , Menachem Hirsch

引用次数: 21

Computed tomographic evaluation of the solitary nonpulmonic nodule 孤立性非肺结节的ct评价

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90026-6

David Thickman

引用次数: 1

CT appearance of giant renal angiomyolipoma 巨大肾血管平滑肌脂肪瘤的CT表现

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90029-1

Mauricio Castillo, Javier Casillas

引用次数: 5

CT and ultrasound in abscess detection at specific anatomic sites: A study of 198 patients CT和超声在特定解剖部位脓肿检测中的应用:198例患者的研究

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90028-X

Robert W. Jasinski, Gary M. Glazer, Isaac R. Francis, Rebecca L. Harkness

引用次数: 23

MR diagnosis of herniation of the left ventricle through a pericardial window 经心包窗的左心室疝的MR诊断

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90024-2

Peter A. Rothschild, Robert D. Tarver, Orest B. Boyko, Dewey J. Conces Jr

引用次数: 6

Magnetic resonance imaging examination of denervated muscle 失神经肌肉的磁共振成像检查

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90023-0

Debra Shabas, Gary Gerard, Dennis Rossi

引用次数: 78

Porencephaly: Computed tomography (CT) scan findings 颅孔畸形:计算机断层扫描(CT)表现

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90030-8

T.M. Kolawole, P.J. Patel, A.H. Mardi

引用次数: 8

Computed tomography of primary malignant fibrohistiocytoma of the lung 原发性肺恶性纤维组织细胞瘤的计算机断层扫描

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90027-8

Ida Ismailer, Arfa Khan, John C. Leonidas, Edward Wind, Peter Herman

引用次数: 11

Axis selection in transverse magnetic resonance imaging of the brain: Electronic angulation techniques 脑横向磁共振成像的轴选择:电子角度技术

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90022-9

Roger A. Hyman , Jon H. Edwards , Orlando Alvarez , Jonathan Wiener , Harry L. Stein

{"title":"Axis selection in transverse magnetic resonance imaging of the brain: Electronic angulation techniques","authors":"Roger A. Hyman , Jon H. Edwards , Orlando Alvarez , Jonathan Wiener , Harry L. Stein","doi":"10.1016/0730-4862(87)90022-9","DOIUrl":"10.1016/0730-4862(87)90022-9","url":null,"abstract":"<div><p>The cylindrical design of most head coils utilized with current magnetic resonance (MR) imaging units and the necessity of close approximation of the coil to the head to maximize signal-to-noise ratio precludes flexion or extension of the head to any significant degree during imaging of the brain. For this reason, the canthomeatal line is approximately parallel to the standard transverse magnetic axis. Standard computed tomography (CT) scans in the transverse plane are usually obtained at an approximately 25° angle to Reid's baseline (RBL). This leads to projection differences in viewing and comparing standard transverse MR and CT studies. High convexity lesions which may present anteriorly on a given CT section may present posteriorly on an MR section which appears to be at a comparable level on first inspection. Secondly, one or more transverse MR sections usually display a portion of the occipital lobes behind the cerebellar hemispheres. The region of the tentorium and straight sinus can occasionally give rise to a vermiform appearance (the “AVM artifact”). Thirty patients were studied with MR at a 20–30° angulation to RBL without any loss of image quality and with excellent visualization of the posterior fossa. The effect of transverse axis change on lesion position was demonstrated in five high convexity lesions and by utilizing fixed brain specimens. While clearly MR can accurately localize lesions utilizing orthogonal multiplanar techniques, it is suggested that investigators and clinicians currently performing MR studies of the brain consider potential advantages of electronic angulation techniques for comparative clinical studies and certain research applications.</p></div>","PeriodicalId":77839,"journal":{"name":"Computerized radiology : official journal of the Computerized Tomography Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0730-4862(87)90022-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14703219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Non-linear CT windows 非线性CT窗口

Computerized radiology : official journal of the Computerized Tomography Society Pub Date : 1987-01-01 DOI: 10.1016/0730-4862(87)90025-4

John M. Gomori , Israel Steiner

{"title":"Non-linear CT windows","authors":"John M. Gomori , Israel Steiner","doi":"10.1016/0730-4862(87)90025-4","DOIUrl":"10.1016/0730-4862(87)90025-4","url":null,"abstract":"<div><p>The display of computerized tomographic (CT) data requires data compression because of the limited shades of grey which the eye can differentiate. This may lead to information loss which can be minimized by a more efficient utilization of the available levels of grey than that afforded by conventional linear windows. Automated histogram equalization for grey level assignment has not been satisfactory because of the underlying assumption that the information content at any given CT level is proportional to the number of pixels at that level. For four different anatomic regions; the lumber spine, abdomen, brain and chest, an empiric graph of the clinical information content vs CT levels was integrated to yield the shape of a graph assigning shades of grey vs CT level i.e. a non-linear window. This non-linear window curve was utilized in the same manner as the linear window, namely the window center and width were under the direct control of the observer through the window center and width knobs. Each non-linear window was implemented on images of its anatomic region and interactively optimized on the screen till a maximal display of information was obtained. These optimal non-linear windows compared favorably with linear windows in most cases. This method provides the means to display more information on a CT image with no extra processing time, additional equipment or special training.</p></div>","PeriodicalId":77839,"journal":{"name":"Computerized radiology : official journal of the Computerized Tomography Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0730-4862(87)90025-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14703221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18