Browsing by Author "M.S. Agrawal"
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PublicationArticle A study on electron filters in reducing surface dose in cobalt-60 teletherapy(1977) M.S. Agrawal; G.C. Pant; P.C. Sood[No abstract available]PublicationArticle Carcinoma of breast associated with pregnancy and lactation(1981) K. Sahni; B. Sanyal; M.S. Agrawal; G.C. Pant; N.N. Khanna; S. KhannaOut Of 840 Cases Of Breast Carcinoma Seen Over A Period Of Ten Years, 18 Were Found To Be Associated With Pregnancy And Lactation. According To The Mode Of Onset And Presentation Of The Disease, These Patients Were Divided Into Four Groups. The Average Age Of These Patients Was 31.9 Years Old. Thirteen Out Of 18 Patients Presented In A Very Advanced Stage Of The Disease. In A Short Period, Involvement Of Liver Was Noticed In 8, Brain In 3, And Bones And Lung In 2 Each. The Disease Was Bilaterally Simultaneous In Two Patients. The Acceleration Of Growth Was Noticed During Second And Third Trimesters Of Pregnancy As Well As During Lactation. The Termination Of Pregnancy In Three Patients Did Not Alter The Clinical Course Of The Disease. Copyright © 1981 Wiley‐Liss, Inc., A Wiley CompanyPublicationArticle Carcinoma of the anal canal(1980) B. Sanyal; G.C. Pant; K. Sahni; M.S. Agrawal; B.N. Bhatnagar; S.K. Roy; S. Gupta104 cases of tumours of the anal canal were registered in the Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, Banaras Hindu University, out of a total of 11,147 cases over a period of 10 years. The frequency was 0.98% of all cases. Squamous cell carcinoma was the most common tumour. All patients presented in a fairly advanced stage of the disease, 50% of which presented with inguinal lymph adenopathy at the first presentation. Only 55 patients out of 104 completed radiotherapy. 28 patients were managed on a curative line and 16 on a palliative basis. The majority of the patients had relief of symptoms following radiotherapy, but the overall survival at 3 and 5 years in this series was 41% and 33%, respectively. This presentation highlights the clinical spectrum of the cases, and the role of radiotherapy in the management of these tumours has been stressed.PublicationArticle Effect of oblique incidence on surface dose in cobalt-60 teletherapy and use of silver filter(1977) M.S. Agrawal; P.C. Sood; G.C. Pant[No abstract available]PublicationArticle PublicationArticle Efficacy of a silver filter in reducing the surface dose in 60Co teletherapy(1979) M.S. Agrawal; P.C. Sood; G.C. PantOne of the advantages of 60Co radiations in the treatment of malignant diseases is its skin sparing effect. Theoretically, the dose on the skin in 60Co teletherapy is too small to give any observable skin reactions for routine therapeutic dose but the published reports indicate that in practice the skin reactions are much more than expected. The increased skin reactions are due to the increased dose on the skin because the gamma beam from 60Co gets contaminated by scattered electrons. Use of electron filters and increased distance between the source and the patient are two methods in use to reduce the electron contamination of the beam. Earlier studies with electron filters indicate that medium atomic number materials are best for this purpose. A new filter material - silver - has beem tried by us and its efficacy in reducing the surface dose has been studied. Loss of skin sparing of 60Co beam because of oblique incidence has also been reported. This arises from the geometric considerations of the direction of the scattered electrons in the tissue. This problem has also been studied and the role of a silver filter in such circumstances has also been investigated. The studies lead us to conclude that the medium Z materials, such as silver, are best under all treatment conditions. However, if the treatment field is small (10×10 cm2 or less) or the distance between the filter and the skin is more (25 cm or more), the filter materials in a wide range of atomic numbers are equally effective. The silver filter is also effective in reducing the increased surface dose due to oblique incidence of the beam. © 1979.PublicationArticle Exit dose measurement for correct assessment of doses under radiotherapy in cancer cervix patients(1987) A.K. Asthana; M.S. Agrawal; B. Sanyal[No abstract available]PublicationArticle Penumbra trimmers and surface dose in cobalt-60 teletherapy(1978) M.S. Agrawal; P.C. Sood; G.C. Pant[No abstract available]PublicationArticle Radiation myelopathy(1979) B. Sanyal; G.C. Pant; K. Subrahmaniyam; M.S. Agrawal; S. MohantyFive cases of radiation myelopathy were found in a total of 10000 cases given radiotherapy from 1968 to 1977. The clinical presentation and treatment details including the total dose, treatment volume, number of fractionations, overall time, and the RET value at the spinal cord were calculated and compared with other reports on this subject. The total number of fractionations ranged from 20 to 26 with an overall time of 32 days to 37 days. The dose received by four patients ranged from 1030 to 1900 RET, a little higher than the tolerance level of the spinal cord as compared to reported values. Two patients in this series had high blood pressure. The incidence of radiation myelopathy, already acceptably low, could possibly be reduced further by meticulous planning of radiation.PublicationArticle Radiotherapy in skin cancer(1977) B. Sanyal; G.C. Pant; M.S. AgrawalNinety six cases of skin cancer are reviewed. They were seen over a period of five years from 1968 to December 1973. Their clinical presentation and management are discussed. Male patients predominate over the females in the ratio 3 : 1, and 47.5% of the lesions were confined to head and neck regions followed by 35.6% in the lower extremities. Most of the lesions were squamous cell carcinoma (72 cases) and Basal cell carcinoma ( 14 cases). All these cases were managed by radiotherapy. Immediate results and survival were recorded. The emphasis has been made to educate the general public regarding cancer in general and skin cancer in particular, so that they report at an early stage of the disease for the appropriate treatment.PublicationArticle Rectaldosimetry in carcinoma of cervix during intracavitary radiotherapy(1987) M.S. Agrawal; V.N. Bhattathiri; B. Sanyal[No abstract available]PublicationArticle PublicationArticle PublicationArticle Use of impression material for dose build-up on the surface in cobalt-60 teletherapy(1979) M.S. Agrawal; G.C. Pant[No abstract available]PublicationArticle Visualization of gall bladder in liver scan and its importance(1975) M.S. Agrawal; G.C. Pant; B. Sanyal[No abstract available]