(A) ;REAR FOCUS TYPE ZOOM LENS,申请号JP19830074178-传众专利搜索

(A) ;REAR FOCUS TYPE ZOOM LENS

申请公布号：JPH0414006(B2)

申请号：JP19830074178

申请日期：1983.04.28

申请公布日期：1992.03.11

申请人：

YUNIBAASHITEI OBU SHEFUIIRUDO ZA

发明人：BURAIAN HIRUTON BURAUN;DEBITSUDO CHAARUZU BAABAA;IAN RESURII FURIISUTON

分类号：A61B5/05;A61B5/053

主分类号：A61B5/05

摘要：Tomographic images (I1 and I2) of a body are constructed by placing a plurality of surface electrodes (1 to 16) at spaced intervals on the body (M), causing currents to flow in the body, and measuring the potential between pairs of electrodes, calculating the potential in each case on the assumption that the body consists of one uniform medium, plotting the isopotentials corresponding to the calculated results to create a uniform image of the body, obtaining the ratio between the measured potential and the calculated potential in each case, and modifying the image in accordance with the respective ratios by increasing the impedance along an isopotential in proportion to a ratio greater than unity or decreasing the impedance in proportion to a ratio less than unity. The calculations of potentials and the obtaining of ratios are carried out using a computer and the plotting of the isopotentials is carried out by a visual display unit (VDU) and/or a print-out unit run off the computer.