ABSTRACT
The usefulness of real-time sonography, duplex sonography, computed tomography (CT), cystography, diagnostic aspiration, and percutaneous drainage in the diagnosis and treatment of peri-pancreatic-transplant fluid collections was retrospectively assessed in 46 recipients of extraperitoneal pancreatic transplants. Forty-four abnormalities were identified in the extraperitoneal space at sonography, including four pancreatic pseudocysts associated with malfunction of the pancreatic duct, seven abscesses, six hematomas, nine urinomas, six early postoperative fluid collections that spontaneously resolved, six cases of pancreatitis, and six cases of vascular occlusion. Sonography (including pulsed Doppler sonography) was the procedure of choice in detecting fluid collections and diagnosing pancreatitis, rejection, vascular thrombosis, and pancreatic duct malfunction. CT was diagnostic in four of six hematomas; cystography was diagnostic in seven of nine urinomas. Sonographically guided percutaneous intervention enabled three patients to avoid surgery and allowed optimal surgical planning for six patients.
Subject(s)
Diagnostic Imaging , Pancreas Transplantation , Postoperative Complications/diagnosis , Abscess/diagnosis , Adult , Diabetes Mellitus, Type 1/surgery , Female , Hematoma/diagnosis , Humans , Kidney Failure, Chronic/surgery , Kidney Transplantation , Male , Pancreatic Pseudocyst/diagnosis , Pancreatitis/diagnosis , Postoperative Complications/therapy , Radiography, Interventional , Thrombosis/diagnosis , UrineABSTRACT
The interpretability of transmitted digitized radiographic images is an important factor in the operation and use of teleradiology systems. Matrix size may influence diagnostic accuracy of the interpretation. Commercially available equipment has certain built-in image enhancement controls that may increase the interpretability of the image received. Evaluation of the effect of varying the matrix size and other factors on diagnostic accuracy are described.
Subject(s)
Computer Communication Networks , Image Processing, Computer-Assisted , Microcomputers , Radiology Information Systems , Humans , ROC CurveABSTRACT
Software designed for entry, retrieval, and maintenance of radiographic case-file data on a microcomputer offers considerable help in maintaining such records in a radiology department. The case files are based on the Index for Roentgen Diagnoses, published by the AmericanCollege of Radiology. The terms and code numbers of the index are included in the software, so that the user need only enter the diagnostic term desired; the code numbers and exact terminology are assigned automatically. The software is written for an IBM-compatible microcomputer. Residents and staff radiologists have been using the program for the past two years to store and find both confirmed cases and other interesting cases. The system's capacity exceeds 70,000 entries on a 20-megabyte had disk. The program has five features not found in previous similar programs and not attainable with manual methods.
Subject(s)
Hospital Information Systems/organization & administration , Radiology Information Systems/organization & administration , Software , Microcomputers , Software DesignABSTRACT
Teleradiology is the remote interpretation of digitized radiographic images by physicians. The images are usually transmitted over telephone lines, but satellite communication has also been used. The interpretability of the transmitted image is an important factor in the operation and use of teleradiology systems. Commercially available equipment has certain built-in functions that may enhance the interpretability of the image received. These functions and their usefulness in diagnosis are described. It is also possible to enhance the image for transmission, prior to digitizing, by certain manual techniques. These may be of value in situations where the first transmission is lacking in some quality. A test of these functions and techniques is reported.
Subject(s)
Diagnostic Imaging/instrumentation , Image Processing, Computer-Assisted/methods , Telecommunications/instrumentation , Image Processing, Computer-Assisted/instrumentationABSTRACT
Twenty-one patients with insulin-dependent diabetes mellitus received simultaneous renal and segmental pancreatic transplants. A retrospective analysis of 112 real-time ultrasound (US) images, 108 technetium-99m glucoheptonate scinti-scans, 55 computed tomography (CT) scans, and 11 cystograms was performed. Complications that were observed included pancreatic transplant rejection, pancreatitis, arteriovenous occlusions, hemorrhage, abscesses, and extravasation at the pancreaticocystostomy site. Scintigraphy is a sensitive indicator of normal transplant function but is non-specific when findings are abnormal. Real-time US aids in the differentiation of acute rejection from pancreatitis and arteriovenous occlusion. CT is helpful for evaluation of postoperative complications. Imaging may play an important role in the noninvasive management of pancreatic transplants.
Subject(s)
Diagnostic Imaging , Pancreas Transplantation , Adult , Diabetes Mellitus, Type 1/surgery , Female , Graft Rejection , Humans , Male , Middle Aged , Pancreas/diagnostic imaging , Pancreas/pathology , Postoperative Complications/diagnosis , Radionuclide Imaging , Tomography, X-Ray Computed , UltrasonographySubject(s)
Brain Diseases/drug therapy , Prednisone/therapeutic use , Sarcoidosis/drug therapy , Adult , Brain Diseases/diagnosis , Brain Diseases/diagnostic imaging , Humans , Magnetic Resonance Spectroscopy , Male , Radiography , Sarcoidosis/diagnosis , Sarcoidosis/diagnostic imaging , Sexual Dysfunction, Physiological/diagnosisABSTRACT
A case of hemangiopericytoma in the male pelvis is presented in which computed tomography demonstrated a well-circumscribed, homogeneous enhancing mass with feeding vessels.
Subject(s)
Hemangiopericytoma/diagnostic imaging , Pelvic Neoplasms/diagnostic imaging , Hemangiopericytoma/blood supply , Hemangiopericytoma/pathology , Humans , Male , Middle Aged , Pelvic Neoplasms/blood supply , Pelvic Neoplasms/pathology , Tomography, X-Ray ComputedABSTRACT
A microcomputer may be installed in any of several areas in a radiology department or office to automate data processing. Such areas include the reception desk, the transcription office, the quality-control station, and remote or satellite radiography rooms. Independent microcomputers can be interconnected by networking, using small hardware and software packages and cables, to effect communication between them, afford access to a common data base, and share peripheral devices such as hard disks and printers. A network of microcomputers can perform many of the functions of a larger minicomputer system at lower cost and can be assembled in small modules as budgetary constraints allow.
Subject(s)
Computers , Microcomputers , Radiology Department, HospitalABSTRACT
Coronary artery calcification (CAC) is usually detected by fluoroscopy or on cine films during coronary angiography, but measurement of the calcification is not possible. Gated tomography of the heart provides a full sized image with high contrast spatial resolution of 0.1 mm and low contrast spatial resolution of 0.76 mm. The radiation exposure to the heart is between 1-5% of that experienced with coronary cinefluorography . Measurement of the diameter of calcium deposits is possible and calcium that could be related to arterial stenosis may be identified.
Subject(s)
Calcinosis/diagnostic imaging , Coronary Angiography , Electrocardiography , Tomography, X-Ray/methods , Animals , Dogs , Humans , Male , Middle AgedABSTRACT
Missouri Automated Radiology System has functioned in full support of the Department of Radiology for more than 7 years. For the past 5 years, MARS has functioned as a minicomputer system on a DEC (Digital Equipment Corporation) PDP-15 computer. While continuing to effectively support the department, in daily use by 20 staff and 15 resident physicians, MARS has continued to function in a research and development mode. With the continuous development of new applications, MARS is now essential to the function of the department and has again proven the point that physicians and computers can function symbiotically in the medical environment.
