Professional certification and site accreditation in bone densitometry.
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Journal Article↗
Biomedical subjects
L S Avecilla
Publications and source records attributed to L S Avecilla.
Economic impact of quality control in diagnostic radiology.
With ever-increasing costs confronting health care facilities, much attention is being focused on various cost-containment projects. Although it is generally assumed that a radiology department quality control program will increase costs, institutional savings may also result. A comprehensive quality control program involving continuing education, simplification of technic, processor control, standardization of cassettes, and preventive maintenance resulted in substantial savings for a medical school radiology department.
Allied Health Personnel↗
Ultrasound demonstration of wandering spleen.
The correct preoperative diagnosis of a wandering spleen is infrequently made either clinically or with conventional radiologic studies. Since ultrasound can readily identify the spleen, it may assist in making this diagnosis. We describe three patients to illustrate the advantages and usefulness of ultrasound. In one postmastectomy patient, the suspected abdominal metastasis was shown to be a displaced spleen, thus obviating the necessity for an exploratory laparotomy. In the other two patients, ultrasound diagnosis was helpful in clinical treatment by localizing the wandering spleen. Ultrasound evaluation is particularly suited for patients with obscure abdominal masses because it is safe, simple, and fast.
Abdominal Neoplasms↗
Ultrasound diagnosis of intramural intestinal hematoma.
Intramural intestinal hemorrhage in hemophilia has been diagnosed by ultrasound. The sonographic pattern consists of a tubular anechoic mass containing a core of strong echoes. Recognition of intestinal hematoma is important because of its bearing on treatment and prognosis. To our knowledge, this is the first reported case.
Gastrointestinal Hemorrhage↗
Phase behavior and structure of aqueous dispersions of sphingomyelin.
The phase behavior of bovine brain sphingomyelin in water has been determined by polarizing light microscopy, differential scanning calorimetry, and X-ray diffraction. Lamellar phases, in which water is intercalated between sheets of lipid molecules arranged in the classical bilayer fashion, are present over much of the phase diagram. An order-disorder transition separates the high temperature, liquid crystalline, lamellar phase from a more ordered lamellar phase at low temperatures. The hydration characteristics of sphingomyelin are similar to the structurally related lecithin in that only limited amounts of water are incorporated above and below the transition. Above the transition at 47 degrees C, a maximum of 35% by weight of water can be incorporated between the lipid bilayers, the total thickness at maximum hydration being 60.2 A, the lipid thickness 38 A, and the surface area per lipid molecule at the interface 60 A(2). Water in excess of 35% by weight is present as a separate phase. Below the phase transition, at 25 degrees C a maximum of 42% by weight of water may be incorporated between the lipid bilayers. On increasing the hydration, the lamellar repeat distance increases from 63.5 A to a limiting value of 76 A. Within this hydration range the calculated lipid thickness decreases from 63.5 to 42.5 A, and the surface area per lipid molecule increases from 36.1 to 53.6 A(2). Although these changes may be accounted for by a structure in which the hexagonally packed ordered hydrocarbon chains tilt progressively with respect to the normal to the bilayer plane on increasing hydration, it is possible that changes in other more complex lamellar structures may be responsible for these variations in lipid thickness and surface area.
Animals↗
Baccalaureate level education in radiologic technology: results of a survey.
A survey of baccalaureate level programs in radiologic technology was undertaken. The survey sought to elicit information by observing as many aspects of each program as possible in an effort to present to the academic community a summary of the current approaches to upper division education in the profession. The results suggest a cetain lack of uniformity in educational technology, which may well be indicative of the modifications in, and redefinition of, the role of the baccalaureate radiographer in view of the rapidly changing field of radiology itself.
Curriculum↗