scholarly journals 136. Rapid Process for X-Ray Cine Film

1992 ◽  
Vol 48 (9) ◽  
pp. 1748
Keyword(s):  
X Ray ◽  
Rapid Process ◽  
Cine Film

scholarly journals A STUDY OF BOOTSTRAP METHOD FOR X-RAY CINE FILM SENSITOMETRY

1995 ◽  
Vol 51 (9) ◽  
pp. 1203-1208 ◽  
Author(s):  
EIJI MATSUDA ◽  
GOH HITOMI ◽  
TAIZOH SANADA ◽  
TOSHIAKI KANEDA ◽  
KOHJI YOSHIDA ◽  
...  
Keyword(s):  
Bootstrap Method ◽  
X Ray ◽  
Cine Film

The Measurement of Blood Flow Waveforms from X-Ray Angiography: Part 2: Application to Video Recordings of Digital Subtraction Angiography

1992 ◽  
Vol 206 (2) ◽  
pp. 87-91 ◽  
Author(s):  
J N H Brunt ◽  
G H du Boulay ◽  
A Wallis
Keyword(s):  
Blood Flow ◽  
Electromagnetic Flowmeter ◽  
Video Tape ◽  
Digital Subtraction ◽  
Flow Measurements ◽  
X Ray ◽  
Video Recordings ◽  
Cine Film ◽  
Digital Subtraction Angiographic ◽  
Flow Waveforms

A method of measuring blood flow from X-ray angiograms recorded on cine film, by obtaining contrast mass values at numerous positions along individual vessels and at multiple instants of time, has been previously reported. In the present work it was hypothesized that the signal-to-noise limitations of recordings on video tape could be overcome by recording already-subtracted angiograms from a digital subtraction angiographic (DSA) system and that the spatial resolution of video was adequate to use a similar measurement method. Validation experiments were recorded, in which flows measured using a calibrated electromagnetic flowmeter passed through tubes of 4–7 mm diameter, during injections of 2–5 ml contrast medium. The video sequences were computer analysed and produced angiographic flow measurements agreeing with the electromagnetic flows to within 5 per cent. A case study of a clinical carotid artery DSA in a patient with secondary carcinoma metastases in the brain is described. It is concluded that accurate flow measurements can be made from DSA video recordings.

scholarly journals Study of the Separate Exposure Method for Bootstrap Sensitometry on X-ray Cine Film

1997 ◽  
Vol 53 (12) ◽  
pp. 1779-1784
Author(s):  
EIJI MATSUDA ◽  
TAIZO SANADA ◽  
GO HITOMI ◽  
KOKI KAKUBA ◽  
YOSHIHARU KANGAI ◽  
...  
Keyword(s):  
X Ray ◽  
Exposure Method ◽  
Cine Film

scholarly journals SENSITOMETRY OF X-RAY CINE FILM

1985 ◽  
Vol 41 (4) ◽  
pp. 600-609
Author(s):  
KAZUO AWAI ◽  
TAKASHI WAKAMATSU ◽  
HIDEAKI TOGI ◽  
KAZUO SUGUMI ◽  
YOSHINORI YAMAMOTO
Keyword(s):  
X Ray ◽  
Cine Film

scholarly journals 336. Sensitivity of X-ray Cine Film

1991 ◽  
Vol 47 (8) ◽  
pp. 1367
Author(s):  
Hiroaki Arai ◽  
Mitsuo Hasegawa
Keyword(s):  
X Ray ◽  
Cine Film

scholarly journals MANUFACTURE OF SENSITOMETER FOR X-RAY CINE FILM

1992 ◽  
Vol 48 (7) ◽  
pp. 969-977
Author(s):  
SHIGEYASU MURAYAMA ◽  
HIROSHI AMAUCHI ◽  
SATORU KIKUCHI ◽  
MORIMICHI UJIIE
Keyword(s):  
X Ray ◽  
Cine Film

scholarly journals 136. Rapid Prosess For X-Ray Cine film

1993 ◽  
Vol 49 (2) ◽  
pp. 256
Author(s):  
tamotsu yoshizawa ◽  
mitsuru kobayashi ◽  
hiroaki arai ◽  
mitsuo hasegawa
Keyword(s):  
X Ray ◽  
Cine Film

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

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