1.Intracoronary Brachytherapy: Present and Future.
Korean Journal of Medicine 2002;63(5):466-468
No abstract available.
Brachytherapy*
2.Coronary Brachytherapy.
Korean Circulation Journal 2001;31(5):463-465
No abstract available.
Brachytherapy*
3.A retrospective analysis on treatment and survival outcome of locally advanced cervical cancer with or without brachytherapy: A single institution study
Joan Kristel B. Abrenica ; Genalin F. Amparo
Philippine Journal of Obstetrics and Gynecology 2020;44(6):1-11
Background:
Concurrent chemoradiotherapy composed of pelvic external beam radiotherapy (PEBRT) with weekly chemotherapy plus intracavitary brachytherapy (ICBT) remains to be the treatment of choice for locally advanced cervical cancer (LACC). However, some patients are not suitable to have ICBT right after pelvic radiation. Locally, active chemotherapy is being given to these patients until they can undergo the procedure.
Objective:
The aim of the study was to determine the impact of ICBT in the treatment and survival outcomes of cervical cancer and to compare it with active chemotherapy.
Methodology:
This was a retrospective study of patients with LACC treated with or without brachytherapy in a single institution from January 2002 to December 2017.
Results:
The 5-year over-all survival (OS) and 5-year recurrence free survival (RFS) of patients with ICBT were both significantly improved compared to those without ICBT (p=0.001 and p=0.038), respectively. Factors that were significantly correlated with adequate response for brachytherapy were non-squamous cell histology (OR 0.65, CI 0.46- 092, p=0.016), initial tumor size of > 5cm (OR 0.41, CI 0.26-0.65, p=0.001), > 50% decrease in the original tumor size at the middle part of PEBRT (OR 1.83, CI 1.2-2.8, p=0.005), > 3 cycles of chemotherapy as radiosensitizers (OR 2.66, CI 1.79- 3.9, p=0.001), > 45 days duration of PEBRT (OR 0.63, CI 0.41-0.97, p=0.04) and > 2 episodes of anemia during PEBRT (OR 0.67, CI 0.52-0.85, p=0.001).
Conclusion
Brachytherapy offers significant improvement on tumor control and over-all survival for patients with LACC. Active chemotherapy may offer some benefit in terms of delaying tumor recurrence or progression. However, this did not translate to survival impact if the patient was not able to have brachytherapy at all.
brachytherapy
;
4.Dose Calculation for the Buchler Remote Afterloading System.
Sun Rock MOON ; Soo Kon KIM ; Jeong Ok LEE ; Jeong Ku KANG ; Seung Kon KIM ; Weon Kuu CHUNG
Journal of the Korean Society for Therapeutic Radiology 1996;14(3):247-253
PURPOSE: The dose calculation program for the Buchler type remote afterloading system was developed. This program also can be used to calculate dose for various sealed sources. METHODS AND MATERIALS: We determined the source length and distribution by dividing the program disk to 72 points. The dose rate for the each program disk and source was calculated. The dose rate table for the xy coordinate was established. The dose rate for the interesting points of the patient were calculated by using this table. We also made isodose curve from this calculations. RESULTS: The storage size for the dose rate table were increased.But the calculation of the dose rate for the patient were carried out rapidly. So we could get real time calculation. CONCLUSION: By using this program, we could calculate the dose rate for the various oints of the patient quickly and accurately. This program will be useful for the treatment with various linear sources.
Brachytherapy
;
Humans
5.Analysis of Accuracy of Apparent Activity According to Calibration Method for High Dose Rate Brachytherapy Source.
Hyun Do HUH ; Jin Ho CHOI ; Sang Hyoun CHOI ; Seong Hoon KIM ; Woo Chul KIM ; Hun Jeong KIM ; Rena LEE ; Kum Bae KIM ; Seong Eon HONG ; Dong Oh SHIN
Korean Journal of Medical Physics 2008;19(4):305-312
The aim of this study is to introduce the accuracy of Ir-192 source's apparent activity using the well-type chamber and the Farmer-type ionization chamber in the high dose rate brachytherapy. We measured the apparent activity of Ir-192 that each medical center in the country has and the apparent activity of calibration certificate provided by manufacturer is compared with that by our experimental measurement. The number of sources used for the activity comparison was 5. The accuracy of the measured activity was in the range of -2.8% to -1.0% and -2.1% to 0.2% for the Farmer-type chamber system (Jig) and for the well-type, respectively. The maximum difference was within 1.0% for comparison with two calibration's tool. Our results demonstrate that well-type chamber as wall as Farmer-type chamber is a appropriate system as the routine source calibration procedures in HDR brachytherapy. Whenever a new source is installed to use in clinics, by periods, a source calibration should be carried out.
Brachytherapy
;
Calibration
6.Is Debulking Combined with Brachytherapy a New Therapeutic Approach for Diffuse Coronary Stent Restenosis?.
Young Joon HONG ; Myung Ho JEONG
Korean Circulation Journal 2004;34(10):927-929
No abstract available.
Brachytherapy*
;
Stents*
7.Is Adjacent Segment Safe after the Brachytherapy for Coronary Stent Restenosis?.
Ok Young PARK ; Myung Ho JEONG
Korean Circulation Journal 2003;33(3):173-175
No abstract available.
Brachytherapy*
;
Stents*
8.Chamber to Chamber Variations of a Cylindrical Ionization Chamber for the Calibration of an (192)Ir Brachytherapy Source Based on an Absorbed Dose to Water Standards.
Seong Hoon KIM ; Hyundo HUH ; Sang Hyun CHOI ; Chan Hyeong KIM ; Chul Hee MIN ; Dong Oh SHIN ; Jinho CHOI
Korean Journal of Medical Physics 2009;20(1):7-13
This work is for the preliminary study for the calibration of an (192)Ir brachytherapy source based on an absorbed dose to water standards. In order to calibrate brachytherapy sources based on absorbed dose to water standards using a clyndirical ionization chamber, the beam quality correction factor kappa(Q,Q0) is needed. In this study kappa(Q,Q0)s were determined by both Monte carlo simulation and semiexperimental methods because of the realistic difficulties to use primary standards to measure an absolute dose at a specified distance. The 5 different serial numbers of the PTW30013 chamber type were selected for this study. While chamber to chamber variations ran up to maximum 4.0% with the generic kappa gen(Q,Q0), the chamber to chamber variations were within a maximum deviation of 0.5% with the individual kappa ind(Q,Q0). The results show why and how important ionization chambers must be calibrated individually for the calibration of (192)Ir brachytherapy sources based on absorbed dose to water standards. We hope that in the near future users will be able to calibrate the brachytherapy sources in terms of an absorbed dose to water, the quantity of interest in the treatment, instead of an air kerma strength just as the calibration in the high energy photon and electron beam.
Brachytherapy
;
Calibration
;
Electrons
;
Water
9.Is Low-Dose-Rate Endorectal Brachytherapy a New Treatment Method for Locally Advanced Distal Rectal Cancer?.
Annals of Coloproctology 2015;31(4):115-116
No abstract available.
Brachytherapy*
;
Rectal Neoplasms*
10.Primarily treatment of some cancer by brachytherapy AGAT-VU1
Journal of Vietnamese Medicine 2001;266(11):20-24
22 patients with cancer (cervical cancer: 4, renal cancer: 6, esophageal cancer: 5, toungue cancer: 4 and throat cancer: 3) treated by the brachy therapy. The results have shown that good out come (73%), medium outcome (14%) and poor outcome (13%).There was no complications of both radiation or technique. The brachytherapy AGAT-VU1 had some advantages including the short duration of treatment course, automatics, control by program, saty, relibility.
neoplasms
;
Brachytherapy
;
therapeutics