Journal of Medical Physics
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   1994| January-March  | Volume 19 | Issue 1  
    Online since April 24, 2009

 
 
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Absorbed Dose Measurements In Photon And Electron Beams Using AAMP TG-21 Protocol
S Meenakshi, V Murali, A.V Lakshmanan
January-March 1994, 19(1):9-14
The AAPM TG -21 protocol takes into account the chamber dependent and radiation dependent parameters in determining the absorbed dose. Absorbed dose measurements are done for photon and electron beams using this protocol. Two cylindrical chambers of different wall materials and a flat chamber are made use of. The response of the chambers have been studied.
[ABSTRACT]   Full text not available  [PDF]
  491 137 -
Radiation Induced Changes In The Kidney Of Passer Domesticus Linn (House Sparrow)
C.L Verma, R.K Purohit, M Srivastava, R.K Chaudhary, M.L Gupta
January-March 1994, 19(1):35-38
In the present investigation alterations in biochemical and reno-somatic index values and histological picture induced by gamma radiation in kidney of Passer domesticus Linn. (House sparrow) have been studied. The birds were exposed to 10 Gy of gamma radiation and autopsied at post-radiation intervals of 1,2,3,7 and 14-days. Biochemically, increase in values of proteins, glycogen, acid and alkaline phosphatase activity and decrease in cholesterol value were noticed on day-1 which continued upto day-3. The value of reno-somatic index increased on day-1 after exposure which continued upto 3rd day, thereafter it declined. Histological changes appeared on day-1 which became severe after 3-days of exposure, these changes coincided with the biochemical findings.
[ABSTRACT]   Full text not available  [PDF]
  508 88 -
Quality Control In A Computer Designed Compensating Filter
R.C Joshi, T Ganesh, Rajendra Kumar, G.K Rath, G.S Pant
January-March 1994, 19(1):21-24
Compensating characteristics and dosimetry verifications were performed on a computer designed compensator in a wax phantom. Our investigations show a uniformity of 3% to 5% over the entire field. Compensator designed in this system accounts for both external air gap and the internal tissue inhomogeneities and hence has the advantage over other compensating filters.
[ABSTRACT]   Full text not available  [PDF]
  494 50 -
Evaluation Of Gamma Backscattering Effect On Dose At The Patient Exit Plane On Teletherapy Treatment Table
V.K Sathiya Narayanan, S.S Supe, R Ravichandran, S.L Keshava
January-March 1994, 19(1):15-20
Many investogators have reported that there is some reduction in the absorbed dose at the exit surface of the body when megavoltage radiations are used. In situations, where larger or multiple fields are used, a part of the beam at the exit portion meets the metallic or rigid surface of the table top. This introduces additional backscattered photons and electrons which enhances the exit surface dose. This increase in the exit dose because of the exit surface touching the metallic portion of the table top has been measured using a commercially available parallel plate chamber. The ionisation Ratio (IR) between the chamber reading with and without table top is a measure of the increase of dose. IR is reported for three different 60Co teletherapy machines and a Linear Accelerator (for 6 and 18 MV) for the field sizes 5 x 5,10 x 10,15 x 15 and for various thicknesses of the phantom (8 to 23 cm).
[ABSTRACT]   Full text not available  [PDF]
  467 68 -
A Software For Treatment Calculations
S Ramesh Babu, A.C Deka
January-March 1994, 19(1):30-34
This dbase software is developed for computation of teletherapy, intracavity and strontium-90 beta therapy treatment time, machine output calibration, reference point dose rate for the given intracavitary source configuration, different radiobiological parameters and record manipulations.
[ABSTRACT]   Full text not available  [PDF]
  442 88 -
Dose Rate Considerations In Brachytherapy : Biological Equivalence Of LDR And HDR
Colin G Orton
January-March 1994, 19(1):1-8
Full text not available  [PDF]
  284 134 -
Personal Computer Software For Clinical Evaluation And Quality Assurance Of Gamma Camera Images
B Singh, B.R Bairi
January-March 1994, 19(1):25-29
Full text not available  [PDF]
  262 84 -
A Graphical Method To Simplify The Application Of TDF To Iridium Implantation
Sanjay S Supe, Hema Vaithianathan
January-March 1994, 19(1):39-40
Full text not available  [PDF]
  247 56 -
Renography Using A Probe System Designed For Field Use In Developing Countries
J.C.W Crawley, J.H Amuasi, D Ofori
January-March 1994, 19(1):41-43
Full text not available  [PDF]
  251 39 -
A Report On An IAEA Consultants' Meeting On Formulation Of Requirements For Off-Site Emergency Response In The Use Of Radiation Sources : Vienna November 1-5, 1993.
A.N. NandaKumar
January-March 1994, 19(1):46-48
Full text not available  [PDF]
  232 42 -
Report On The Scientific Programme Of The XIV AMPI Conference On Medical Physics Held At Nagpur During October 2-4, 1993
S.J. Supe
January-March 1994, 19(1):44-45
Full text not available  [PDF]
  185 49 -
 
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