1.Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer
Yuri JEONG ; Jeong Geun OH ; Jeong Ku KANG ; Sun Rock MOON ; Kang Kyoo LEE
Radiation Oncology Journal 2020;38(1):60-67
Purpose:
We performed three-dimensional (3D) dose reconstruction-based pretreatment verification to evaluate gamma analysis acceptance criteria in volumetric modulated arc therapy (VMAT) for prostate cancer.
Materials and Methods:
Pretreatment verification for 28 VMAT plans for prostate cancer was performed using the COMPASS system with a dolphin detector. The 3D reconstructed dose distribution of the treatment planning system calculation (TC) was compared with that of COMPASS independent calculation (CC) and COMPASS reconstruction from the dolphin detector measurement (CR). Gamma results (gamma failure rate and average gamma value [GFR and γAvg]) and dose-volume histogram (DVH) deviations, 98%, 2% and mean dose-volume difference (DD98%, DD2% and DDmean), were evaluated. Gamma analyses were performed with two acceptance criteria, 2%/2 mm and 3%/3 mm.
Results:
The GFR in 2%/2 mm criteria were less than 8%, and those in 3%/3 mm criteria were less than 1% for all structures in comparisons between TC, CC, and CR. In the comparison between TC and CR, GFR and γAvg in 2%/2 mm criteria were significantly higher than those in 3%/3 mm criteria. The DVH deviations were within 2%, except for DDmean (%) for rectum and bladder.
Conclusions
The 3%/3 mm criteria were not strict enough to identify any discrepancies between planned and measured doses, and DVH deviations were less than 2% in most parameters. Therefore, gamma criteria of 2%/2 mm and DVH related parameters could be a useful tool for pretreatment verification for VMAT in prostate cancer.
2.A Case of Ectopic Hydatidiform Mole in the Uterine Cornua.
Jeong Oh KANG ; In Young YOO ; Sang Yong KIM ; Jeung Hyung LEE ; Chae Won LEE
Korean Journal of Obstetrics and Gynecology 1999;42(2):392-395
Ectopic pregnancy refers to gestation in which the fertilized ovum implants on any other tissure than tbe mucus membrane lining the uterine cavity. Cornual (intertitial) pegnancy is a relatively uncommon but potentially catastrophic form of ectopic pregnancy, defined as implantation in the intramural portion of a fallopian tube. A hydatidiform mole usually occupies the uterine cavity but it's occurrence in the uterine tube is extremely rare. Only a few cases of primary hydatidifm mole of the tube have been reported. We experienced a case of ectopic hydatidiform mole in the uterine cornua and so present it with brief review of literatures.
Fallopian Tubes
;
Female
;
Hydatidiform Mole*
;
Membranes
;
Mucus
;
Pregnancy
;
Pregnancy, Ectopic
;
Zygote
3.A Study on the Characteristics of the Intravenous Therapy for children in the hospital.
Hyang Soon OH ; Iho Sook JEONG ; Sook Hee AHN ; Kang Won CHOE
Korean Journal of Nosocomial Infection Control 1997;2(1):29-39
BACKGROUND: Approxinately 30%-70% of patients hospitalized receive intravenous(IV) therapy[l-4], It is generally believed that many hospitalized patients experienced IV therapy related complications-including infiltration(swelling), phlebitis, pain, suppurative phlebitis and bacterernia. These complications may be critical to ill children in the hopsital. This study was done to assess the IV therapy related complications and characteristics od the phlebitis of the hospitalized children. METHODS: We collected date prospectively from December 8, 1994 to December 14 at the tertiary care hospital in Seoul. The subhects of this study were children who got new IV catheters during that period. RESULTS: There were 306 new cases(176 children) that got IV therapy and which meant 63.8 per 100 discharge patients. Male(62.8%), pediatric surgery patients(70.6%) were more than female(37.2%) and pediatrucs(28.4%) respectively. The usually used IV sites were the upper extermities(71.3%). Among various purposes of IV therapy, the most common was to administer drugs(74.2%) including antibiotics, and next was to keep vein open (41.2%). By the way, 172 cases(56.3%) had IV related complications and 14 resulted in phlebitis. The most common IV related complication of hospitalized children was swelling(35.1%). The incidence of IV related complication of hospitalized children was swelling(35.1%). The incidence of IV phlebits was higher in pediaterics than in pediatrid surgery (P<0.05), over 12 years old than under that aged patients (P<0.01). CONCLUSION: This study revealed that many hospitalized children experienced the IV related complications. In order to decrease the IV related complications, reduce the incidence and thorough care is recommanded.
Anti-Bacterial Agents
;
Catheters
;
Child*
;
Child, Hospitalized
;
Humans
;
Incidence
;
Phlebitis
;
Prospective Studies
;
Seoul
;
Tertiary Healthcare
;
Veins
4.The comparative study of distortion of untreated cartilages and lyophilized cartilages.
Doo Young OH ; Jeong Hoon KANG ; Hae Cheon CHOI ; Kun Chul YOON
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1998;25(6):949-954
Human untreated costal cartilage was compared with lyophilized human costal cartilage which was treated with defatting solution for 48 hours and freeze drying for 72 hours (-70degree C, 10??bar) on the tendency of distortion. All cartilages, which were taken from six cadavers, were carved 5x5x30mm in size on principle of the balanced cross section. Their distortions were evaluated by two methods at intervals of one week, one month, three months, six months after experiment. At first, the degree of distortion was grossly graded with four steps: grade O; no distortion / grade I; minimal distortion / grade II; moderate distortion / grade III; severe distortion. Second method is measurement and quantification of distortion in the horizontal and vertical plane of cartilage.Untreated cartilage is shown to be an unsatisfactory material, with only three(12%) of the 25 cartilages being cosmetically acceptable(grade 0 and 1) after 6 months. In lyophilized cartilage, 18(94%) of the 19 cartilages were cosmetically acceptable(grade 0 and 1) at 6 months. This figure is highly significant(p<0.01). In another method, distortion in the horizontal(h) and vertical (v) planes of cartilage were measured, and mean values of ???? were calculated. In untreated group, the mean values of ???? were 0.82 at 1 week, 0.91 at 1 month, 1.13 at 3 months, and 1.31 at 6 months. In lyophilized group, the mean values were 0.27 at 1 week, 0.29 at 1 month, 0.40 at 3 months and 0.47 at 6 months. All values were statistically significant(p<0.01).
Cadaver
;
Cartilage*
;
Freeze Drying
;
Humans
5.Influence of weight gain to cardiovascular risk factors.
Dong Ho KANG ; Noh Won PARK ; Jeong Yeol OH ; Won Keun LEE ; In Sang YOO
Journal of the Korean Academy of Family Medicine 1997;18(7):722-730
BACKGROUND: The obese patients increased recently in Korea due to excessive energy intake and decreased physical activity. We are well known that obesity is associted with an increased risk of cardiovascular disease, angina pectoris, hypertension, but not known to influence of weight gain to change in cardio-vascular risk factors. Once, the study of obesity are many but the study of influence of weight gain are small in Korea. This study investigated to influence of weight gain in cardio-vascular risk factors. METHODS: We gatherd case and control group among persons who has taken twice medical examination except disease person from October 1990 to October 1995 at SungAe General hospital. In our study, total 167 case, compare weight gain group(>3kg) with control group to change in cardiovascular risk factor. RESULTS: Sex, age, smoking history, obesity index were not statistically significant difference between two group in the first medical examination. systolic blood pressure, diastolic blood pressure, fasting blood sugar, HDL, total cholesterol/HDL were not statistically significant difference between two group for weight gain. Total cholesterol and triglyceride, LDL were stastistically significant increased. CONCLUSIONS: Weight gain was increased of total cholestrol and triglyceride, LDL, so weight control was important.
Angina Pectoris
;
Blood Glucose
;
Blood Pressure
;
Cardiovascular Diseases
;
Cholesterol
;
Energy Intake
;
Fasting
;
Hospitals, General
;
Humans
;
Hypertension
;
Korea
;
Motor Activity
;
Obesity
;
Risk Factors*
;
Smoke
;
Smoking
;
Triglycerides
;
Weight Gain*
6.Determination of glygated hemoglobin by affinity chromatographymethod.
Myung Seo KANG ; Jeong Ho KIM ; Oh Hun KWON ; Samuel Y LEE
Korean Journal of Clinical Pathology 1991;11(2):363-367
No abstract available.
7.Evaluation of fructosamine tests and preanalytical errors.
Jeong Ho KIM ; Myung Seo KANG ; Oh Hun KWON ; Samuel Y LEE
Korean Journal of Clinical Pathology 1991;11(2):333-339
No abstract available.
Fructosamine*
8.The Renal Function and the Preoperative Predictive Factors Influencing Renal Function after Living Donor Nephrectomy.
Kwi Ho KANG ; Jeong Oh LEE ; Bo Hyun HAN
Korean Journal of Urology 2004;45(2):149-157
PURPOSE: The aim of this study is to identify postoperative renal function and preoperative factors that can predict renal impairment after living donor nephrectomy. MATERIALS AND METHODS: We studied 172 patients undergoing living donor nephrectomy for kidney transplantation (115 males, 57 females). We analyzed the renal function measured by serum creatinine and the 99mTc- diethylenetriamine penta-acetic acid (DTPA) renal scan. Using a univariate and multivariate analysis, we also analyzed multiple independent variables for the remaining renal function following living donor nephrectomy, such as serum creatinine, glomerular filtration rate (GFR), age, sex, duration of follow-up, blood pressure, body mass index (BMI), serum calcium, serum phosphate, serum uric acid. RESULTS: The mean age of the donors was 34 years, and the mean duration of the follow-ups was 11 months. The mean serum creatinine at 11 months after kidney donation was increased compared to preoperative creatinine (1.26mg/dl vs. 0.93mg/dl), and significantly greater in the males than in the females (1.36mg/dl vs. 1.09mg/dl). Mean GFR measured by the 99mTc- DTPA renal scan at 11 months after kidney donation was 69.2 ml/min/ 1.73m2 and similar for men and women (72.3ml/min/1.73m2 vs. 68.3ml/ min/1.73m2). The univariate analysis showed that preoperative creatinine was significantly associated with postoperative creatinine only (p<0.001), and age and sex were associated with the change in creatinine (p=0.046, p<0.001). The univariate analysis also showed that preoperative GFR and age were significantly associated with postoperative GFR (p<0.001, p<0.001), and age was associated with compensatory change in GFR (p= 0.008). The multivariate analysis showed that preoperative GFR was the primary predictive factor of postoperative GFR (r=0.73, p<0.001), and age was an independent secondary predictive factor (r= 0.67, p<0.001). CONCLUSIONS: These results suggest that postoperative renal function has been preserved in kidney donors, and preoperative creatinine, preoperative GFR, and age at donation were the important predictive factors of renal function after living donor nephrectomy.
Blood Pressure
;
Body Mass Index
;
Calcium
;
Creatinine
;
Female
;
Follow-Up Studies
;
Glomerular Filtration Rate
;
Humans
;
Kidney
;
Kidney Transplantation
;
Living Donors*
;
Male
;
Multivariate Analysis
;
Nephrectomy*
;
Pentetic Acid
;
Tissue Donors
;
Uric Acid
9.The Effects of Ventilation Rate and Characteristics of the Hand on Inspiratory Oxygen Concentration and Tidal Volume During Bag-Value Ventilation.
Young Ho JIN ; Tae Oh JEONG ; Ji Hun KANG ; Jae Baek LEE
Journal of the Korean Society of Emergency Medicine 1998;9(1):7-13
BACKGROUND: The self-inflating bag-valve resuscitator is an useful breathing support equipment in the cardiopulmonary resuscitation, the transportation of patients who required ventilation assist, or respiratory therapy. The inspiratory oxygen concentration (FiO2) or tidal volume (VT) delivered to the patient depends on various conditions during bag-valve ventilation. METHODS: During bag-valve ventilation without a reservoir at oxygen flow rates of 10 l/min, we evaluated fifty six volunteers to determine the FiO2 and VT at ventilatory frequencies of 10, 12 and 15 cycles per minute and to observe the effect of hand size and grasp power on FiO2 and VT in two-hand compression methods. RESULT: The FiO2 at frequency of 10 cycles/min were 50.1% and it was higher than other ventilatory frequencies. However, the VT was not statistically different among the changes of ventilatory frequency. In the change of VT according to characteristics of the hand, the operator's hand size exerted influence on VT(larger vs. smaller ; 942ml vs. 885ml, p<0.05), but the grasp power of the hand did not significantly affect. Separate analyses with size or grasp power of the hand failed to reveal significant differences of the FiO2. CONCLUSION: The results suggest that a slowing of ventilatory frequency within the allowable ranges for adequate gas exchange increase the FiO2 during bag-valve ventilation without reservoir, and that hand size may exert influence on the VT without FiO2 changes but grasp power may not be a contributing factor to the VT or FiO2 changes.
Cardiopulmonary Resuscitation
;
Hand Strength
;
Hand*
;
Humans
;
Oxygen*
;
Respiration
;
Respiratory Therapy
;
Tidal Volume*
;
Transportation of Patients
;
Ventilation*
;
Volunteers
10.Primary adenosquamous carcinoma of the colon.
Dong Baek KANG ; Jung Taek OH ; Hyang Jeong JO ; Won Cheol PARK
Journal of the Korean Surgical Society 2011;80(Suppl 1):S31-S35
Adenosquamous cell carcinoma (Ad-SCC) of the colon is rare. The pathogenesis of Ad-SCC is unclear, however, several hypotheses have been suggested. The clinical presentation and gross findings of Ad-SCC of the colon are similar to those of adenocarcinoma of the colon, but Ad-SCC has a more aggressive clinical course and a poorer prognosis. We report on two cases of Ad-SCC of the colon with obstruction; a collision-type Ad-SCC that has not only obstruction but also numerous hepatic metastases, and a composite-type Ad-SCC treated with left hemicolectomy followed by an adjuvant chemotherapy.
Adenocarcinoma
;
Carcinoma, Adenosquamous
;
Chemotherapy, Adjuvant
;
Colon
;
Colonic Neoplasms
;
Neoplasm Metastasis
;
Prognosis