Search PubMed⌕ Search

Biomedical subjects

H I Price

Publications and source records attributed to H I Price.

At least 19 recordsLinked to original sources
PubMed1986

Intraarterial digital subtraction arteriographic evaluation of extremity tumors: comparison with conventional arteriography.

Conventional arteriography and intraarterial digital subtraction arteriography (IADSA) were compared in 36 patients with primary bone or soft-tissue tumors of the extremities. The sensitivity of IADSA was at least equal to conventional arteriography for demonstrating normal or abnormal major arteries and feeding arteries, equal to or superior for depicting tumor stains or draining veins, but slightly inferior for revealing minute tumor vessels. An increase of the matrix size from 256 X 256 to 512 X 512 improved these sensitivities. IADSA with 15% diatrizoate contrast material eliminated the contrast material-induced pain in all patients. With a computer-controlled iris setting, an average of 5 minutes of procedure time and 1.7 R of radiation (0.44 mC kg) per examination could be saved. IADSA reduced the cost of an examination by an average of $67. The results indicate that IADSA was diagnostic in all instances and can replace conventional arteriography for the evaluation of extremity tumors.

Angiography↗
PubMed1986

Radiologic manifestations of delayed radiation necrosis of the brain.

One of the most effective treatment modalities for tumors of the head and neck has been radiation therapy. In a small number of cases, delayed radiation necrosis of the brain is a dreaded and devastating complication of radiation therapy. The imaging studies (radionuclide brain scan, cerebral angiography, computed tomography and magnetic resonance imaging) in 12 cases of histologically proven, delayed radiation necrosis of the brain are analysed. While both computed tomography and magnetic resonance imaging can depict radiation necrosis with great sensitivity, however, the ability of these imaging techniques to differentiate between radiation necrosis and recurrent or residual brain tumor is low.

Adolescent↗
PubMed1985

The computed tomographic findings in benign diseases of the vertebral column.

Computed tomography (CT) has revolutionized the diagnosis of diseases affecting the vertebral column. CT effectively demonstrates the bony vertebral column with its intervertebral articulations, its soft tissue contents, and the surrounding paravertebral soft tissues. The vertebral column may be the site of involvement of a wide variety of benign diseases. These diseases may be congenital or acquired and may arise from within the spinal canal, from the vertebrae themselves, or from the paravertebral soft tissues. These lesions may be unsuspected clinically and may be detected incidentally in patients undergoing CT of the spine for nonspecific complaints. The axial projection is extremely useful in displaying spinal anatomy and pathology and, combined with sagittal and coronal reformation, provides diagnostic information not possible from any other radiological modality. More invasive radiological procedures, such as myelography, may in many cases be obviated, especially if shorter segments of the vertebral column are to be surveyed. The CT findings in many cases are sufficiently characteristic to enable a specific diagnosis to be made.

Arthritis, Rheumatoid↗
PubMed1984

An on-line digital image management system.

The continuing increase in diagnostic examinations using digitally formatted image instrumentation imposes new requirements on the acquisition, display, transmission, recording, and archiving of all diagnostic data. The fabrication decisions and initial clinical testing of a prototype on-line, decentralized digital image management system are described. With this system, raw digital data can be viewed by multiple users as soon as it is acquired by an acquisition node and transmitted to a display node. Radiologists and clinicians have given this system a favorable reception.

Computers↗
PubMed1983

Application of three-dimensional computer reconstruction from computerized tomography to intracranial tumors in children.

A three-dimensional surface reconstruction algorithm was devised from contour information based upon anatomic structures identified by computed tomographic (CT) scanning. The triangular 'tiling' method from which the algorithm was derived accurately reconstructs the surfaces between contours of both supra- and infra-tentorial anatomic sites. Volume and surface area of the lateral ventricles and tumor site were calculated from the surface reconstruction algorithm in four children with intracranial mass lesions. Reconstruction of three-dimensional surfaces from CT head scans could be utilized to plan the surgical approach to supra-tentorial and posterior fossa lesions. The incorporation of this technique may greatly assist neurosurgeons and neuro-oncologists in planning multi-modality therapy and also for localization of small and relatively inaccessible lesions which may not be adequately assessed by conventional methods. Furthermore, the efficacy of radiation therapy and/or chemotherapy in brain tumors can accurately be assessed.

Adolescent↗
PubMed1983

The computed tomographic findings of popliteal cysts.

The computed tomographic (CT) findings of two popliteal cysts are presented, and the correlated anatomico-pathologic changes are discussed. The characteristic findings include thin, well-defined cyst wall, fluid density contents, central septum or septi, and medial popliteal location with mediocaudal extension. These findings, however, may vary due to herniation or rupture of the synovial membrane, gelatinous cyst contents, or metaplastic change of the cyst wall. Differential diagnoses include liposarcoma, popliteal aneurysm or hematoma, thrombophlebitis, xanthoma, fibrosarcoma, or other soft tissue tumors.

Bursa, Synovial↗
PubMed1983

Diagnosis of post-traumatic syringohydromyelia presenting as neuropathic joints. Report of two cases and review of the literature.

Two paraplegic men with post-traumatic syringohydromyelia presented initially with neuropathic arthropathy of the elbow and shoulder, respectively. Both patients had sustained spinal trauma years earlier and had been lost to orthopedic and neurosurgical follow-up study. Characteristic history and physical findings were present in both patients. Conventional myelography failed to demonstrate the lesion in the first patient. The diagnosis in the second patient was confirmed by lumbar injection of low-dose metrizamide followed by immediate and delayed computerized axial tomography in the supine and lateral positions. Both patients were treated by surgical decompression and subarachnoid shunts with arrest of the neurologic deterioration. To the authors' knowledge, this is the first report of patients with post-traumatic syringohydromyelia presenting with neuropathic joints. The present case reports illustrate the need for long-term follow-up studies of patients with spine injury in specialty clinics. The use of computerized axial tomography and low-dose intrathecal metrizamide is advocated for diagnosing post-traumatic syringohydromyelia.

Adult↗
PubMed1982

Computed tomography of sacral and presacral lesions.

Forty-two patients with various sacral and presacral lesions were examined by computed tomography (CT). CT was sensitive in detecting intraosseous neoplasms and presacral soft tissue masses and in seven cases identified lesions not visible on plain films. The total extent of each lesion was readily determined using CT. However, CT is diagnostically nonspecific and differentiation between primary and secondary tumors of the sacrum in generally not possible from the CT appearance alone. CT is also of considerable use in the evaluation of several non-neoplastic conditions of the sacrum, including spinal dysraphism, anterior and internal meningocele and trauma.

Adolescent↗
PubMed1982

The cost of managing digital diagnostic images.

A study of the cost of recording and archiving digitally formatted diagnostic images is presented for an academic radiology department serving a 614-bed university hospital and a large outpatient population. The radiological examinations include computed tomography, nuclear medicine, ultrasound, and digital radiography. The archiving management strategies studied include the combined use of computer magnetic tapes, computer disc storage, and multiformat video film recordings. The estimated cost per patient for the archiving of digital diagnostic images is presented.

Archives↗
PubMed1982

Three-dimensional computer reconstructions of brain lesions from surface contours provided by computed tomography: a prospectus.

We present a prospectus on the use of computer graphics for the three-dimensional reconstruction and visualization of brain lesions from computed tomographic head examinations, including an algorithm that utilizes surface contour information to reconstruct and display three-dimensional anatomical sites. We provide examples of the use of this algorithm. We offer an algorithm for estimation of the volume and surface area of anatomical sites. The advantages and disadvantages for the clinical use of these algorithms are discussed.

Adenoma, Chromophobe↗
PubMed1981

Three-dimensional computer reconstruction from surface contours for head CT examinations.

A three-dimensional surface reconstruction algorithm based on contour information from anatomic sites as identified on computed tomography examinations is presented. This algorithm efficiently reconstructs the surfaces between the contours using a triangular "tiling" method. A three-dimensional perspective view of the reconstructed surfaces is provided by a gray scale cathode-ray tube computer graphics system. Volume and surface area estimations are provided as a direct results of the surface reconstruction algorithm. Three cases are presented to illustrate the three-dimensional surface reconstruction algorithm.

Brain Neoplasms↗
PubMed1981

Multiple paranasal sinus mucoceles.

The clinical and radiological findings in a 56-year-old woman with mucoceles involving the left frontal, both ethmoidal, sphenoidal, and right maxillary sinuses are presented. The predisposing cause was thought to be previous facial fractures. The rarity of this combination of lesions is discussed, including a brief review of the literature.

Female↗