1994 Fiscal Year Final Research Report Summary
Basic Study of Digital Subtraction Using CR-system in Oral Reagion
| Project/Area Number |
04671247
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
外科・放射線系歯学
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| Research Institution | KANAGAWA DENTAL COLLEGE |
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Principal Investigator |
WAKAO Hiromi KANAGAWA DENTAL COLLEGE,DEPARTMENT OF RADIOLOGY,ASSISTANT PROFESSER, 歯学部, 講師 (00104505)
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| Project Period (FY) |
1992 – 1994
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| Keywords | one-shot dual energy subtraction / contrast medium / optimal condition / atomic number / X-ray absorption / tube voltage / filter / IP |
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| Research Abstract |
This study examined the possibility of applying one-shot dual energy subtraction to sialography by CR.Using this study, tube voltage, filter, grid and contrast medium considered to be important for subrtaction were analyzed.
The conclusion I obtained are summarized as follows :
1. The Cu-filters showed a larger SI Than the Sn-filters at each tube voltage.
2. The SI reached a maximum at a tube voltage of 50kV with a Cu-filter of 0.8mm.
3. The maximum SI was observed at a tube voltage of 50 kV with a Cu-filter thickness of 0.8 mm without a grid.
4. The SI was higher without a grid than with a grid and the difference between the SI obtained without and with a grid was larger at lower tube voltages.
5. The maximum SI was recorded with iodine at 50kV,with Neodymium at 70kV and with terbium at 100kV.The development of a contrast medium consisting of an element with an atomic number of about 65 is essential for the clinical application of one-shot dual energy subtraction sialography.
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