Satish C. Prasad

Magadh University

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Daniel A. Bassano

SUNY Upstate Medical University

Lizhong Liu

The University of Texas Southwestern Medical Center

Miljenko V. Pilepich

UCLA Medical Center

Seung S. Hahn

SUNY Upstate Medical University

James A. Purdy

University of California Davis Medical Center

William R. Hendee

University of Minnesota Rochester

Bonnie L. Keshler

SUNY Upstate Medical University

Carlos A. Perez

University of Chile

Joel Heavern

SUNY Upstate Medical University

Prasad R. Kurichety

Barnes-Jewish Hospital

Cooperative Institutions

Mallinckrodt (United States)

Washington University in St. Louis

SUNY Upstate Medical University

Foundation for Physical Medicine and Rehabilitation

Syracuse University

Barnes-Jewish Hospital

Magadh University

State University of New York

The University of Texas MD Anderson Cancer Center

Mallinckrodt (Ireland)

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Computed tomography in definitive radiotherapy of prostatic carcinoma

International Journal of Radiation Oncology*Biology*Physics (1980)

Miljenko V. Pilepich Carlos A. Perez Satish C. Prasad

Prostate carcinoma

10.1016/0360-3016(80)90339-9

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Citations (53)

Determination of dose enhancement in cortical bone substitute material for electron beams

Medical Physics (1991)

Satish C. Prasad

Dose measurements in Witt liquid, which simulates cortical bone, have been compared with dose in water for 6‐, 9‐, 12‐, and 15‐MeV electron beams. Measurements were made using a Farmer ionization chamber. The results of the study show dose enhancement in Witt liquid of 5%, 7%, 4%, and 0.4% for 6‐, 9‐, 12‐, and 15 MeV electrons at shallow depths. The dose to a small mass of soft tissue in bone has also been estimated using ionization measurements. The results show a significantly higher dose in bone.

10.1118/1.596679

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Effective size of the transverse dimension of x‐ray‐tube focal spots

Medical Physics (1977)

Satish C. Prasad William R. Hendee

Corrections for nonuniform x‐ray intensity distributions have been computed for the dimension perpendicular to the anode–cathode axis of x‐ray‐tube focal spots. These correction factors were developed from comparison of OTFs for focal spots with uniform intensity distributions to those for focal spots with symmetric double‐peaked intensity distributions.

X-ray tube

Spots

Intensity

Cathode ray tube

10.1118/1.594372

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Citations (2)

Radiation protection considerations for endocavitary x ray units

International Journal of Radiation Oncology*Biology*Physics (1985)

James A. Purdy Satish C. Prasad Bruce J. Walz Gregory W. Cotter

10.1016/0360-3016(85)90101-4

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Citations (10)

Relation between tolerance dose and treatment field size in radiotherapy

Medical Physics (1978)

Satish C. Prasad

A relation is developed between tolerance dose and field size from an analysis of available clinical data on skin‐tolerance doses for various treatment field sizes in radiotherapy. It is shown that plots of log‐dose against log‐field‐size for various fractionation schedules give isoeffect lines all having approximately the same slope. This suggests a power law relation between tolerance dose and field size. A generalized form of NSD equation, incorporating the field‐size dependence of tolerance dose, is shown to follow naturally when this new relation is combined with Ellis’ NSD relation. Certain discrepancies between the sets of data used in the present analysis are pointed out and it is suggested that more data are needed before the generalized NSD relation can be applied under varying conditions of dose, time, fractionation, and field size.

Field size

10.1118/1.594441

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Citations (12)

Treatment field size and time, dose and fractionation factors in radiotherapy

International Journal of Radiation Oncology*Biology*Physics (1979)

Satish C. Prasad

10.1016/0360-3016(79)90370-5

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Citations (1)

Computerized tomography in definitive radiotherapy of prostatic carcinoma, part II

International Journal of Radiation Oncology*Biology*Physics (1980)

Miljenko V. Pilepich Carlos A. Perez Satish C. Prasad

10.1016/0360-3016(80)90535-0

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Citations (14)

<title>Correction Factors For The Longitudinal And Transverse Dimensions Of X-Ray Tube Focal Spots</title>

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (1976)

Satish C. Prasad

Correction factors are computed for pinhole images of x-ray tube focal spots to be applied along the anode-cathode dimension and the dimension perpendicular to the anode-cathode axis. These correction factors are based upon comparison of MTF's of focal spots with uniform intensity distribution to the MTF's of focal spots with single and double peaked intensity distributions.

Pinhole (optics)

Spots

X-ray tube

Cathode ray tube

Intensity

10.1117/12.965397

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Citations (0)

Metabolic Engineering of Bacteria

Indian Journal of Microbiology (2011)

Ravi Kumar Satish C. Prasad

Metabolic Engineering

Bioprocess engineering

Industrial biotechnology

Synthetic Biology

Industrial microbiology

Biomanufacturing

10.1007/s12088-011-0172-8

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Citations (60)

Comparison of absorbed dose in bone substitute material and water using ionization measurements

Medical Physics (1989)

Satish C. Prasad Daniel A. Bassano

Absorbed dose in a liquid substitute for bone has been compared with absorbed dose in water for 9‐, 12‐, and 15‐MeV electron beams using ionization chamber measurements. The ionization readings were converted to dose using collisional mass stopping power ratios. The collisional mass stopping powers for the liquid substitute of bone were calculated using the Monte Carlo Code PEGS4. The results of our study show that there is an increase in dose in the liquid bone substitute compared to water at shallow depths. The maximum increase in dose was 5%, 4%, and 2% at depths of 1.2, 1.5, and 2.0 cm, respectively, for 9‐, 12‐, and 15‐MeV electrons. The density of the liquid bone substitute was 1360 kg/m 3 and the effective atomic number was 11.

Stopping power

Liquid water

Water equivalent

10.1118/1.596407

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Citations (2)