Postoperative radiotherapy of breast cancer makes it possible to reduce loco-regional recurrence of breast cancer. The treatment technique, which can low-dose region at the junction and lung, is required. To produce proper dose distribution of internal mammary chain and chest wall, authors tried to find the method to expose 60Co gamma-ray on internal mammary region and 7 MeV electron on chest wall. Exposure time of 60Co and monitor unit of 9 MeV were selected so that dose of 60Co at 4 cm depth was the same as that of 7 Mev elevtron at 80% dose depth. The position and direction of electron beam were changed for 60Co beam: 0 degrees, 5 degrees for 0 cm seperation; 0 degrees, 5 degrees, 10 degrees for 0.5 cm seperation; 5 degrees, 10 degrees, 15 degrees for 1 cm seperation. The results are as followings. 1. When the seperation of two fields was increased, dose on the axis of 60Co beam was increased and dose at the junction region decreased while the volume of lung to be exposed to high dose and hot spot size were irregularly changed. 2. The dose distribution in the target volume of internal mammary and chest wall was most ideal when the seperation of two fields was 0 - 0.5 cm and the direction of electron beam was parallel to 60Co beam.
Axis, Cervical Vertebra ; Breast Neoplasms* ; Breast* ; Lung ; Radiotherapy* ; Recurrence ; Thoracic Wall

No abstract available.
Head and Neck Neoplasms* ; Head*

No abstract available.
Neoplasm Metastasis* ; Radiotherapy*

No abstract available.
Sarcoma, Ewing*

No abstract available.
Cervix Uteri* ; Female ; Radiotherapy*

No abstract available.
Cervix Uteri* ; Female ; Radiotherapy* ; Troleandomycin*

Among 238 patients Non-odgkin's lymphoma received radiotherapy at Yonsei Cancer center, Yonsei University Medical College, from 1970 to 1981, 30 patients presented with localized(Stage I & II) gastrointestinal lymphomas. Retrospective analysis of these 30 cases in an attempt to evaluate the influence of various prognostic factors and the effectiveness of therapy is presented. Overall 5 year survival rate of 30 cases of primary gastrointestinal lymphoma was 48%. Bulk of residual disease after initial surgery and stage were significant prognostic factors. Stage I with small residual disease treated with post-p irradiation achieved 100% 5 year survival rate. So above group is considered curable with surgery and post-p irradiation. 80% of Stage II with small residual disease showed 31.5% 5 year survival rate. Non of them died with local failure. So, we suggest that complete surgical resection of tumor mass should be attempted initially in the management of localized gastrointestinal lymphomas and systemic chemotherapy is needed in addition to post-p irradiation in the cases of Stage II and large residual disease after initial surgery.
Drug Therapy ; Humans ; Lymphoma* ; Radiotherapy ; Retrospective Studies ; Survival Rate

No abstract available.
Lung*

The preliminary analysis has been made of 73 patients who were treated in the Department of Radiation Therapy at Korea University Hospital for the lung cancer from April 1981 to December 1983. The patients were treated via Co-0 teletherapy unit and the doses were 5,400 rad/6 week for the curative, 3,600~4,500 rad/2 1/2~3 week for the palliative treatment. Thirty two (32/63=51%) patients have been for curative, 25/63 (40%) were for palliative, and 6/63 (9%) were for post-perative radiation. A post-adiation treatment, 28/63 (53%) were able to follow from 2 months to 3 yrs. During the follow up, chest X-ays and/or CT scans were taken and 22/27 (81.4%) of patients were responded more than 50% of tumor regression one month following completion of radiation.
Follow-Up Studies ; Humans ; Korea ; Lung Neoplasms* ; Lung* ; Palliative Care ; Thorax ; Tomography, X-Ray Computed

To evaluate the usefulness of computed tomography (CT) in radiotherapy treatment planning in malignant tumors of thoracic cage, the computer generated dose distributions were compared between plans based on conventional studies and those based on CT scan. 22 cases of thoracic malignancies, 15 lung cancers and 7 esophageal cancers, diagnosed and treated in Department of Therapeutic Radiology of Seoul National University Hospital from September, 1982 to April, 1983, were analyzed. In lung cancer, dose distribution in plans using AP, PA parallel opposing ports with posterior spinal cord block and in plans using box technique both based on conventional studies were compared with dose distribution using AP, PA and two oblique ports based on CT scan. On esophageal cancers, dose distribution in plans based on conventional studies and those based on CT scans, both using 3 port technique were compared. The results are as follows: 1. Parallel opposing field technique were inadequate in all cases of lung cancers, as portion of primary tumor in 13 of 15 cases and portion of mediastinum in all were out of high dose volume. 2. Box technique was inadequate in 5 of 15 lung cancers as portion of primary tumor was not covered and in every case the irradiated normal lung volume was quite large. 3. Plans based on CT scan were superior to those based on conventional studies as tumor was demarcated better with CT and so complete coverage of tumor and preservation of more normal lung volume could be made. 4. In 1 case of lung cancer, tumor localization was nearly impossible with conventional studies, but after CT scan tumor was more clearly defined and localized.
Esophageal Neoplasms ; Lung ; Lung Neoplasms ; Mediastinum ; Radiation Oncology ; Radiotherapy* ; Seoul ; Spinal Cord ; Tomography, X-Ray Computed