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Biomedical subjects

L F Rogers

Publications and source records attributed to L F Rogers.

At least 127 records · Page 7Linked to original sources
PubMed1978

The trough line: a radiographic sign of posterior shoulder dislocation.

Over 50% of posterior dislocations of the shoulder are not recognized initially because of failure to appreciate the subtle clues available on the standard frontal projection. In 15 of 20 cases of posterior dislocation, two parallel lines of cortical bone were identified on the medial aspect of the humeral head. One line represents the medial cortex of the humeral head. The other was found to represent the margin of a troughlike impaction fracture. This is designated the "trough line". This line proved to be an important clue in the recognition of posterior dislocations of the shoulder.

Adult↗
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

Radiologic manifestations of iatrogenic changes of the esophagus.

The review of the roentgen manifestations of iatrogenic changes in the esophagus permits their grouping into two major categories of intentional and nonintentional alterations. In the first group, iatrogenic changes are encountered following reconstructive or other types of surgery, radiotherapy, and their respective complications. Nonintentional changes of the esophagus include injuries induced during diagnostic procedures, life-saving measures, and drug therapy. The knowledge of the spectra of possible iatrogenic alterations is important for accurate radiologic evaluation of the patients and the recognition of complications.

Adult↗
PubMed1977

Roentgen manifestations of radiation injury to the gastrointestinal tract.

Radiation injury of the gastrointestinal tract requires a minimum dose of 4200 to 4500 rads. The symptoms and signs of radiation injury usually appear within 6 to 24 months following therapy. The radiation induced changes include mucosal atrophy and ulceration associated with an obliterative endarteritis in the supportive vasculo-connective tissue. The roentgen manifestations are those of an ischemic process but may also mimic those of recurrent malignant disease. Obstruction, hemorrhage, and fistula formation are common complications. Surgery is frequently required. The morbidity and mortality is considerable.

Colon↗
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↗
PubMed1977

Intradiploic neural heterotopia. A rare calvarial defect.

Two proved cases of intradiploic neural heterotopia of the skull, a rare cause of calvarial defects, are presented. The literature is reviewed. Common radiographic characteristics include an intradiploic rarefaction, a well-defined margin with or without sclerosis, a lobulated appearance with normal intervening bone, or a cluster of multiple lytic areas with normal bone between them.

Adult↗
PubMed1977

Injuries of the medial epicondylar ossification center of the humerus.

The complex nature of the ossification centers makes elbow injuries in a child or adolescent difficult to evaluate. The medial epicondylar ossification center is involved in a significant proportion. Injuries vary from simple avulsions to wide displacement with entrapment in the elbow. When entrapment occurs, it may be mistaken for the trochlear ossification center and the true nature of the injury overlooked. Radiographic findings are presented. The anteroposterior view was found to be diagnostic in minimal or marked avulsions of the medial epicondyle because of the characteristic inferior displacement. The anteroposterior view may not always be diagnostic in cases of entrapment of the medial epicondyle; the lateral view is usually diagnostic. In elbow dislocation, the presence and position of the medial epicondyle must be ascertained. Comparison and oblique views are often of value.

Adolescent↗
PubMed1976

Simplified method for standardization of roentgenographic image quality using penetration quality measurements.

A simplified method for standardization of roentgenographic image quality is described. The method employs the concept of penetration quality (PQ) originally established for calibration of x-ray tube potential (kVp). In order to verify that the PQ measurement is useful for standardization of roentgenographic image quality in a clinical situation, a cadaver was selected for patient simulation. It has been shown that PQ may be utilized for roentgenographic technique specification in place of kVp. The validity of this standardization was evaluated subjectively by radiologists.

Humans↗
PubMed1976

Increased risk for spondylitis stigmata in apparently healthy HL-AW27 men.

Evidence for ankylosing spondylitis was sought by clinical, radiologic, and ophthalmologic examination in HL-A W27-positive men, aged 18 or older, selected from a tissue-donor population. Back pain of 3 months' duration or longer (P less than 0.05), back stiffness, restricted lumbar flexion and chest expansion, sacroiliac erosions (P less than 0.05) and sclerosis, and ophthalmologic sequels of anterior uveitis were found more often in the 24 men of the W27 group than in a control group of 31 men lacking this antigen. Based upon accepted criteria, 3 W27 persons had definite spondylitis and an additional 3 W27 persons and one control subject had findings strongly suggestive of spondylitis (P less than 0.05). This striking frequency, if extrapolated to the general population, would place approximately 1 of 4 W27-positive men at risk for this disease.

Adolescent↗
PubMed1975

Beverage can pull-tabs. Inadvertent ingestion or aspiration.

Potential medical hazards are involved in the procedure of dropping the "pull-tab" into an aluminum beverage can before drinking the contents. We have seen two cases of inadvertent ingestion and one of inadvertent aspiration of the pull-tab. One of the patients who had ingested a pull-tab required endorcopic extraction of the pull-tab from the esophagus, and the patient who had inhaled a pull-tab required an open thoracotomy for removal of the foreign body from the bronchus. Aluminum is not as dense as radiopaque or other metals and is, therefore, frequently difficult to identify on standard roentgenograms.

Adult↗
PubMed1975

Radiological manifestations of radiation-induced injury to the normal upper gastrointestinal tract.

Radiation-induced injury to the normal esophagus, stomach, and duodenum in patients with advanced cervical carcinoma who received high para-aortic lymph-node irradiation to an average tumor dose of 5,000 rads is discussed. Radiation esophagitis is usually the result of mediastinal irradiation for bronchogenic carcinoma. The most consistent radiological finding is abnormal motility, with esophageal stricture and/or ulceration occurrring less frequently. Radiation gastritis usually presents as pyloric ulceration or irregular contractions of the antrum, simulating gastric carcinoma. Postbulbar duodenal mucosal thickening, ulceration, and strictures may occur. Pertinent clinical features, pathogenesis, and pathological correlations are discussed.

Adolescent↗
PubMed1975

Occult central fractures of the acetabulum.

Four cases of occult central acetabular fractures are presented. The oblique plane of the fracture line and the lack of displacement of the fracture fragments made the fractures difficult of impossible to visualize in the anteroposterior projection. The posterior oblique projection placed the fracture line perpendicular to the x-ray beam and, therefore, evident on the resultant roentgenogram. In the 3 cases in which this view was obtained, the fracture was disclosed. In the fourth case the fracture was demonstrated by tomography. In order to improve the roentgenographic assessment of pelvic trauma, consideration should be given to obtaining posterior oblique views of the pelvis as a matter of routine.

Acetabulum↗
PubMed1975

Transient post-vagotomy dysphagia: A distinct clinical and roentgenographic entity.

Dysphagia is a relatively infrequent complication of vagotomy in the postoperative period. The most common form is a transient post-vagotomy dysphagia which requires not treatment other than the temporary exclusion of solid food. Accurate diagnosis is possible on the basis of clinical history and typical roentgenographic findings. The onset of dysphagia characteristically occurs with the first ingestion of solid foods on the seventh to fourteenth postoperative days. A barium swallow examination reveals persistent tapered narrowing of the therminal three to four centrimeters of the esophagus. Most cases are relieved in two to six weeks without clinical or roentgenographic residua. Five cases of transient postvagotomy dysphagia are presented.

Adult↗