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Revista interamericana de radiologia最新文献

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Computer controlled hyperthermia unit for cancer therapy. 用于癌症治疗的计算机控制热疗装置。
Revista interamericana de radiologia Pub Date : 1981-01-01
J V Fayos, C F Gottlieb, Q Balzano, K Ahmad, Y H Kim
{"title":"Computer controlled hyperthermia unit for cancer therapy.","authors":"J V Fayos,&nbsp;C F Gottlieb,&nbsp;Q Balzano,&nbsp;K Ahmad,&nbsp;Y H Kim","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Hyperthermia is the artificial elevation of tissue temperature above 41 degrees C with therapeutic intent. Most of the currently used hyperthermia units lack feedback temperature control mechanisms, and, therefore, are not optimal for clinical trials. To solve this problem, we have developed a control system based on a microcomputer. The computer measures the tumor and normal tissue temperature using fine thermocouple sensors and regulates the output of the microwave generator to achieve and maintain the prescribed tumor temperature under specified conditions. Safety procedures are incorporated to avoid heating the tumor or normal tissue beyond predetermined limits.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"6 1","pages":"7-10"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18224355","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: 0
Gray scale ultrasonography and transhepatic cholangiography in evaluation of obstructive jaundice: a comparative study. 灰度超声与经肝胆管造影评价梗阻性黄疸的比较研究。
Revista interamericana de radiologia Pub Date : 1981-01-01
C E Pena, M Sanders, R Ramirez
{"title":"Gray scale ultrasonography and transhepatic cholangiography in evaluation of obstructive jaundice: a comparative study.","authors":"C E Pena,&nbsp;M Sanders,&nbsp;R Ramirez","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A total of forty-four jaundiced patients were studied by one or both diagnostic modalities (Gray Scale Ultrasonography or Transhepatic Cholangiography--THC--). The thin needle transhepatic cholangiography permitted in vivo correlation of the ultrasonographic findings. Patients with obstruction were confirmed by surgery. Many of the non-obstructive cases underwent liver biopsy. The accuracy of Gray Scale Ultrasonography in differentiation of surgical from medical jaundice dependent on the serum bilirubin level at the time of the examination. For serum bilirubin levels of seven or more milligrams percent, the accuracy was almost one hundred percent. For serum bibiribuin levels of less than seven milligrams percent, the accuracy was approximately eighty-three percent. THC using the thin needle is the ultimate diagnostic procedure and complements the ultrasound information, especially in cases with minimal to moderate icterus. A proposed flow chart for evaluation of the jaundiced patient is presented. The ability to determine the presence of obstruction by demonstrating dilated bile ducts at different levels of serum bilirubin with Gray Scale Ultrasonography was evaluated. Percutaneous TCH using the thin needle (Chiba Needle) made possible the in-vivo correlation of many of the ultrasound findings, as well as the demonstration of surgical jaundice in patients with normal sized bile ducts.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"6 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18224348","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: 0
What is your diagnosis? Radiation-induced osteosarcoma. 你的诊断是什么?辐射诱导骨肉瘤。
Revista interamericana de radiologia Pub Date : 1981-01-01
I J Torres
{"title":"What is your diagnosis? Radiation-induced osteosarcoma.","authors":"I J Torres","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The initial roentgenogram obtained in 1969 exhibits a Ewing's sarcoma of the distal left femur. The patient was subsequently treated with radiotherapy. The follow-up films obtained five years later show evidence of an osteosarcoma in the previously treated area.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"6 1","pages":"25-6"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17984668","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: 0
Dosimetry disparities resulting from two accepted methods of calibration of cobalt-60 teletherapy machines. 两种公认的钴-60远程治疗机校准方法造成的剂量学差异。
Revista interamericana de radiologia Pub Date : 1981-01-01
R P Nair, N S Menon, M Kartha
{"title":"Dosimetry disparities resulting from two accepted methods of calibration of cobalt-60 teletherapy machines.","authors":"R P Nair,&nbsp;N S Menon,&nbsp;M Kartha","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The primary concern of all involved in the management of radiotherapeutic patients is that the tumor dose delivered to each and every patient in one institution is identical to that delivered anywhere else. Despite the advocacy 1,2,3,4 for the calibration of high energy photon beams at 5 cm depth or beyond in a water phantom to reduce the effect of electron \"contamination\" from collimators, filters, applicators, etc., the \"in-air\" method of calibration is still in vogue in many institutions in the United States and elsewhere. The introduction of S.I. units in radiology is likely to create ambiguity in proper conversion factors from exposure to absorbed dose which can be avoided if field instruments are calibrated in terms of absorbed dose in water under specified conditions. The present study shows that the estimated error can be as much as 7% low when the \"in-air\" method of calibration is used instead of measurements in a large water phantom at 5 cm depth for cobalt-60 photon beams and hence recommends that the procedure for \"in-air\" calibration for high energy photon beam should be discontinued.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"6 1","pages":"17-20"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18224350","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: 0
A conversion table for use with varying S.S.D. and depth in treatment planning. 在治疗计划中使用不同sd和深度的转换表。
Revista interamericana de radiologia Pub Date : 1980-10-01
M E Feldman
{"title":"A conversion table for use with varying S.S.D. and depth in treatment planning.","authors":"M E Feldman","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In the clinical treatment of patients the physician often changes from treating S.S.D. to treating S.A.D. or another S.S.D. This alteration in treatment geometry can occur because of easier treatment set-up due to changes in the port size, the depth or other physical parameters. A group of tables has been developed and used for several years to present a single parameter from the multiple factors involved that will allow more simple conversion for the physician, physicist or technician performing the calculations without immediate access to a programmable computer or calculator. The tables are presented and examples of their use given for typical situations.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"105-8"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18464261","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: 0
Radiation pneumonitis following electron beam radiotherapy. 电子束放射治疗后的放射性肺炎。
Revista interamericana de radiologia Pub Date : 1980-10-01
J S Wade, R K Kamath, C W Coffey, Y Maruyama
{"title":"Radiation pneumonitis following electron beam radiotherapy.","authors":"J S Wade,&nbsp;R K Kamath,&nbsp;C W Coffey,&nbsp;Y Maruyama","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A case of radiation pneumonitis is reported. The problem presented in a postmastectomy breast patient after completion of 5000 rads of high-energy electron beam radiotherapy. Within 7 months the lungs showed almost complete clearing and clinical symptoms had disappeared.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"117-20"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17831767","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: 0
Prenatal ultrasonographic diagnosis of fetal cystic hygroma. 胎儿囊性水肿的产前超声诊断。
Revista interamericana de radiologia Pub Date : 1980-10-01
R González, F G Sommer, K J Taylor
{"title":"Prenatal ultrasonographic diagnosis of fetal cystic hygroma.","authors":"R González,&nbsp;F G Sommer,&nbsp;K J Taylor","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The terms cystic lymphangioma or hygroma have been used to describe large, single or multilocular, fluid-filled cavities. While such cavities are most often located on one side of the fetal neck, they occasionally are multiple and may be found in other locations, such as the axillary regions, mediastium, oral cavity and groin. Bilateral hygromas of the neck are not uncommonly observed in aborted fetuses, often in association with wide-spread lymphangiectasis. A case is presented of a fetus with cystic hygromas in the cervical region which were revealed by prenatal ultrasonographic examination.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"121-3"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18464264","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: 0
What is your diagnosis? Gastric leiomyoma. 你的诊断是什么?胃平滑肌瘤。
Revista interamericana de radiologia Pub Date : 1980-10-01
R Calderón
{"title":"What is your diagnosis? Gastric leiomyoma.","authors":"R Calderón","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Smooth muscle tumors are the second most common benign tumors of the stomach after adenomatous polyps. Most often they present as solitary submucosal lesion. Occassionally they may be multiple. They usually present as a smooth mass, although they may be pedunculated and rarely present as gastroduodenal intusuception, when they are located in the distal antrum and prolapse into the duodenum. Leiomyomas may be submucosal, intramural or subserosal. Because of this peculiarity they may grow predominantly intraluminal as well as extraluminally.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"125-6"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18464265","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: 0
Sonic silhouetting of the aorta. 主动脉的声音剪影。
Revista interamericana de radiologia Pub Date : 1980-10-01
M C Hill, M B Isikoff, C Weiner
{"title":"Sonic silhouetting of the aorta.","authors":"M C Hill,&nbsp;M B Isikoff,&nbsp;C Weiner","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The diagnosis of diseases involving and arising from structures around the abdominal aorta has been described. Sonic silhouetting of the wall of the aortic due to lymphomatous involvement of the para-aortic lymph nodes is well known. It may be found with metastatic para-aortic lymphadenopathy, retroperitoneal fibrosis and pancreatic carcinoma where the tumor is adjacent to the aortic wall. Sonic silhouetting of the aorta associated with a pancreatic mass indicates malignancy. Extensive sonic silhouetting due to pancreatic carcinoma can have the appearance of a clot containing abdominal aortic aneurysm.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"109-11"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18464262","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: 0
Pulmonary cysts in progressive systemic sclerosis (scleroderma). 进行性系统性硬化症(硬皮病)的肺囊肿。
Revista interamericana de radiologia Pub Date : 1980-10-01
D A Henry
{"title":"Pulmonary cysts in progressive systemic sclerosis (scleroderma).","authors":"D A Henry","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A young man with progressive systemic sclerosis (PSS) and pulmonary complaints exhibited enlarging lung cysts on chest x-ray. These rather uncommon findings in PSS result from alveolar dissolution and obstructive emphysema. Diffuse pulmonary fibrosis is basic to this process as well as to the more familiar pulmonary roentgen changes in PSS.</p>","PeriodicalId":76463,"journal":{"name":"Revista interamericana de radiologia","volume":"5 4","pages":"113-6"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18464263","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: 0
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