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Biomedical subjects

T Ogami

Publications and source records attributed to T Ogami.

8 recordsLinked to original sources
PubMed1989

[Case report of three impacted supernumerary teeth in the premaxillary region].

A case is presented of a six-year-six-month-old boy with three impacted supernumerary teeth in the premaxillary region. The radiographic examination showed one mesiodens resorbing the root of the left primary central incisor and two inverted supernumerary teeth, also displacement of the unerupted permanent central incisors. Surgical treatment was performed to remove these supernumerary teeth. The forms of the mesiodens exhibited tubercularly shaped crown with four-conical cusp and two inverted supernumerary teeth showed a conicalshaped crown with incomplete root. According to the family history, a sibling had a supernumerary tooth in the same region which had been extracted in the past.

Child↗
PubMed1984

[Low energy tail spectra of characteristic X-rays detected by a Si(Li) X-ray detector].

Characteristic X-ray spectra are inherently accompanied by the tail spectra in the low energy side when X-rays are detected with a semiconductor X-ray detector. The tail spectra of Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr and Mn KX-rays have been observed using two different Si(Li) X-ray detectors. An annular source of 55Fe has been used to excite the Mg (1.25 keV) to Ti (4.5 keV) KX-rays, and 54Mn and 55Fe sources have been used for the detection of Cr (5.4 keV) and Mn (5.9 keV) KX-rays, respectively. Observed intensity ratios of the tail area Nt to the Gaussian X-ray peak area NP have exhibited to change remarkably at the Si-K adsorption edge energy 1.84 ke V. When X-ray spectra detected with different Si(Li) detectors are compared at some specific characteristic X-ray, different values of Nt/Np intensity ratios as well as different line shapes of tail spectra have been observed. Using a simple model, the thickness of Si layer which generates the tail spectrum has been estimated, i.e., the thicknesses are about 0.05 micron for one detector and 0.09 micron for the other detector. The generation of the tail spectrum is known to be partially due to the escape effect of photoelectrons or Auger electrons from the intrinsic region.(ABSTRACT TRUNCATED AT 250 WORDS)

Diffusion↗
PubMed1979

Echocardiographic features of Uhl's anomaly. A case report.

M-mode echocardiography on a fifty-eight year old female with Uhl's anomaly showed several characteristic findings, which were considered to be useful in differentiating Uhl's anomaly from Ebstein's. Those findings were normal tricuspid diastolic closing velocity, the relatively early tricuspid valve opening, easy visualization of the tricuspid valve in usual position and the unusual mid-diastolic pulmonic valve full opening. The premature opening of the pulmonic valve correlated with the right atrial and ventricular mid-diastolic pressure exceeding that of the pulmonary artery.

Diagnosis, Differential↗