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Biomedical subjects

H L Neiman

Publications and source records attributed to H L Neiman.

At least 19 recordsLinked to original sources
PubMed1979

Thoracic aortic imaging without angiography.

Imaging of the thoracic aorta without recourse to angiography has great theoretic appeal. We have used computerized tomography (CT) in the initial evaluation of 297 patients with suspected mediastinal disease. Nineteen of this group had important findings related to the thoracic aorta: aortic dissection (six), descending thoracic aortic aneurysm (nine), suspected aortic trauma (three), and suspected false aneurysm at a coarctation repair (one). In all cases, the aorta and related pathology were readily demonstrated by CT, aided by the intravenous infusion of contrast material. In 13 of 15 cases, aortic dissection and aortic aneurysm could be accurately diagnosed. In two instances of ascending aortic dissection, it was not possible to distinguish the false lumen from mural thrombus in an atherosclerotic aneurysm.

Aorta, Thoracic↗
PubMed1979

Estimation of prostatic size by suprapubic ultrasonography.

Previous ultrasonic scanning of the prostate primarily has involved the transrectal approach. In this study the suprapubic approach was chosen because it uses basic ultrasound equipment and is atraumatic. In 29 patients undergoing prostatectomy there was a highly significant correlation (r equals 0.95) between the prostatic weight determined by this method and the postoperative weight of the adenoma.

Humans↗
PubMed1979

Gray-scale ultrasound diagnosis of peripheral arterial aneurysms.

Diagnostic ultrasound is a feasible technique for demonstrating the presence of an aneurysm in the popliteal, femoral, iliac, and brachial arteries. All aneurysms were correctly identified and confirmed by arteriography, surgery, or examination of the amputated specimen. The popliteal artery in healthy volunteers had a mean size of 0.8 +/- 0.2 cm. Neither the age nor the sex of the patient influenced artery size. In patients with known abdominal aortic aneurysms of significant atherosclerosis, the popliteal size was within two standard deviations from the mean of normal popliteal arteries.

Adolescent↗
PubMed1979

Computed vs. conventional tomography in evaluation of primary and secondary pulmonary neoplasms.

One hundred patients, ultimately proved to have chest malignancies, were evaluated prospectively with conventional chest tomography and computed tomography. In 58 patients with primary malignancies, conventional tomograms were more useful in evaluation of the hilus than CT scans. The mediastinum was better assessed by CT. Thus, evaluation of the presence of neoplasia is better accomplished by conventional examination, while extent of disease is best assessed by CT. Thoracotomy for curative resection was not attempted (in the latter cases of this series) based on CT findings of mediastinal involvement. In 42 patients with metastases to the chest, CT scans of the lung parenchyma were more sensitive than whole lung tomography but had little additional impact on patient treatment. Nevertheless, in 18 patients the results of CT or whole lung tomography directly affected patient therapy.

Aged↗
PubMed1979

Computed tomography of the larynx.

The normal computed tomographic anatomy of the larynx and surrounding structures is illustrated and discussed. An attempt is made to distinguish various types of tissues in cross-sectional display. The advantages of computed tomography over other modalities used for imaging the laryngeal region include the capacity to depict structural relationships in cross-section, to better define cartilaginous involvement by adjacent neoplasms, and to identify vascular components with contrast enhancement. The clinical application of computed tomography with respect to radiation therapy treatment planning of laryngeal tumors in an important feature of this imaging technique.

Humans↗
PubMed1979

The radiologic significance of the left pulmonary ligament. Experience with 26 patients.

Pathologic processes confined to or by the left pulmonary ligament present a confusing radiographic appearance. Such processes may simulate pleural scarring, parenchymal scarring, or even left lower lobe collapse. Radiologic awareness of this structure is limited because in the normal state, it is not visualized on either posteroanterior or lateral chest x-ray films. The absence of secondary signs of left lower lobe collapse, together with a process which may extend above the level of the left hilum, is valuable in confirming that such a triangular density seen behind the left cardiac border is disease in or confined by the pulmonary ligament, rather than left lower lobe collapse.

Adult↗
PubMed1979

Ultrasonographic evaluation of pericholecystic abscesses.

Pericholecystic abscess formation is a serious complication of cholecystitis that develops after gallbladder perforation and is usually associated with acute inflammatory signs and symptoms. Ultrasonographic findings in three surgically proven cases of pericholecystic abscess are reported. The findings ranged from a well defined band of low-level echoes around the gallbladder to multiple, poorly defined hypoechoic masses surrounding an irregular, indistinct gallbladder outline. The former situation correlated with a well encapsulated pericholecystic inflammatory process, while the latter was associated with extensive abscess formation resulting from gallbladder rupture. Cholelithiasis was identified in two of the three cases. Ultrasound for preoperative detection of pericholecystic abscess is discussed.

Abscess↗
PubMed1978

Ureterolymphatic backflow.

A case is reported of apparent radiologic demonstration of a communication between a completely obstructed distal ureter and its draining lymphatics in a patient with invasive bladder tumor involving the ureteral orifice.

Aged↗
PubMed1978

The spectrum of radiologic findings in allergic bronchopulmonary aspergillosis.

Early diagnosis of allergic bronchopulmonary aspergillosis (ABPA) is important. Initiation of corticosteroid therapy in ABPA is essential to prevent progressive destruction of lung parenchyma. The earliest radiographic manifestations of the disease may be present only on bronchograms. In addition to the classic radiographic findings (infiltrate, massive homogeneous consolidation, tram-line shadow, parallel line shadow, ring shadow, toothpaste shadow, glove-finger shadow), perihilar infiltrates simulating adenopathy (pseudohilar adenopathy) and air fluid levels were frequently demonstrated.

Adolescent↗
PubMed1978

Computed tomography in the detection of retroperitoneal hemorrhage after translumbar aortography.

Direct imaging of retroperitoneal hemorrhage following translumbar aortography was performed using computed tomography. Seven patients were scanned over the area of aortic entry immediately after undergoing angiographic examination. In five cases, there was definite evidence of periaortic hematoma, most commonly seen as a discrete soft tissue density with absorption coefficients between +20 and +35 EMI units. Other signs of retroperitoneal bleeding were less consistently present (e.g., loss of aortic contour, aortic displacement, and thickening of diaphragmatic crura). The clinical implications of detecting significant hemorrhage following translumbar aortography are also discussed.

Aortography↗
PubMed1978

Dose reduction in mammography.

The Min-R system is more than a satisfactory substitute for xerography. At equal distances, the images obtained are equivalent. Radiation exposure was 25 per cent of xerography, a significant reduction in exposure. By using a long cone and improving geometry, superior images were obtained in 4 per cent of 400 comparison patients. If mammography is to be used as an early detection device in patients with carcinoma of the breast, modalities with lower exposure requirements must be used. Min-R, a new film screen system, fulfills the requirement of reduced patient exposure without loss of diagnostic accuracy.

Female↗
PubMed1977

Bladder fistula.

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Colonic Neoplasms↗
PubMed1977

Chiba needle percutaneous transhepatic cholangiography.

Percutaneous transhepatic cholangiography with the Chiba University needle has been utilized in 30 patients. The ducts were successfully demonstrated in all 21 patients with obstructive jaundice. Sixty-seven percent of normal or stenosed ducts were visualized. No serious complications occurred and emergency post-procedural laparotomy was unnecessary. Our results reflect other reports. Percutaneous transhepatic cholangiography is an efficacious method of evaluating the hepatobiliary system.

Adult↗
PubMed1977

Urological complications of regional enteritis.

Urological complications of regional enteritis occur frequently and may be clinically unsuspected. Radiographic findings include nephrolithiasis, characteristic stricture of the ureter, panvesiculitis, and enterovesical fistual. Less specific findings include renal amyloidosis and retroperitoneal abscesses. Mucosla nodularity of the bladder dome, even without gastrointestinal symptoms, should raise the possibility of regional enteritis. On the other hand, occult ureteral stenosis in patients with known regional enteritis may be present. For this reason, it is recommended that routine and periodic excretory urograms be a central part of the evaluation of the patient with regional enteritis.

Adolescent↗