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PubMedDate not supplied

[Visualization of the guinea pig fetus in utero by x-ray densitometry].

The total body X-ray scanner (computer assisted axial tomography) was used to observe the guinea-pig fetus in utero. This new method of investigating obstetrical physiology provides a suitable animal model with quantitative facts about the density of the fetal organs and, using a non-invasive technique, allows precise intrauterine pictures of the anatomy of the fetus to be obtained.

Animals↗
PubMed1980

[Herpes encephalitis treated using adenine-arabino-side and followed-up by densitometry (author's transl)].

In a 52-year-old man suffering from encephalitis, immunofluorescent study of cerebral tissue led to a diagnosis of herpes encephalitis 4 hours after biopsy. Cell cultures on the fourth day confirmed the diagnosis. Such a hypothesis had already been advanced before biopsy on the basis of the electroencephalogram which showed electrical changes with a periodic tendency. Following treatment with adenine-arabinoside, motor deficit and aphasia disappeared in one month whilst there was a parallel increase in antibody levels in the blood and cerebrospinal fluid.

Encephalitis↗
PubMedDate not supplied

[Tomographic densitometry of the human thorax].

We show the first clinical images obtained by a new tomographic system based on the detection of the scattered gamma photons of 99mTc by the chest tissues. These images show satisfactory contrast and tomographic effect on the half-chest near the radioactive source. Both effects tend to decrease on the contralateral half-chest. The images rendered important data in differential diagnosis of perfusion defects evident by lung scintigraphy with macroaggregated albumin labeled with 99mTc. Pulmonary density was normal and homogeneous in a healthy volunteer and also in a patient with pulmonary embolism. It demonstrated a hyperdense pulmonary mass in a patient with tumor of the right lung, which produced a perfusion defect evident in the conventional lung scintiscan, and a shadow in the gamma ray transmission image.

Female↗
PubMed1983

[Computer tomographic densitometry of the normal vertebral body spongiosa].

The absorption values of cancellous bone of the third lumbar vertebral body were measured in 80 patients by CT. It was possible to demonstrate a statistically significant linear correlation between absorption values and patient age. The older the patient, the lower the average absorption values of cancellous bone. The average absorption values in patients between 20 and 30 Jrs. were found to be about 200 HU, between 30 and 50 Jrs. 180, between 60 and 70 Jrs. 120 and between 70 and 80 Jrs. 100 HU. Although correlation between calcium salt content and absorption of bone under CT are well known, there are other factors (mainly fatty involution of bone marrow) who influences the absorption behaviour of cancellous bone.

Absorptiometry, Photon↗