18 research outputs found

    CT taramalarında hastanın kilosuna göre alınan dozun değişimi

    Get PDF
    Tüm radyoterapi işlemi sırasında çekilen Bilgisayarlı Tomografi (BT) görüntüleri, tedavi portalı tasarımı, planlaması ve hasta pozisyonunun sağlanması için önemlidir. Ancak bu BT taramalarında hastanın aldığı doz, planlama doz hesaplamalarına dahil edilmez. Özellikle adaptif tedavilerde kritik organların limit dozlarının hesaplanmasında günlük BT taramalarından alınan doz çok önemli hale gelmektedir. Bu çalışmada, Monte Carlo tekniğinin kullanıldığı NCICT kodu ile hastaların bazı kritik organları olan kalp ve karaciğerin aldığı dozun hastanın ağırlığına göre değişimi araştırıldı.Computed Tomography (CT) images taken during whole radiotherapy procedure is important for treatment planning, portal design and providing patient position. However, the dose received by the patient in these CT scans are not included in the planning dose calculations. Especially in adaptive treatments, the dose received from daily CT scan becomes very important in calculation of the limit doses of critical organs. In this study, with the NCICT code, which use the Monte Carlo technique, the change of the dose absorbed by some critical organs of the patients, namely the heart and liver, according to the weight of the patient, was investigated

    I-131 radyoizotop aktivitelerinin nükleer tıpta kullanılan organ dozu üzerine etkisi

    Get PDF
    Hayatta radyasyona maruz kalmanın birçok yolu vardır. Özellikle tıbbi uygulamalar, şiddetli maruziyetin en önemli sebebidir. Tıbbi uygulamalarda Bilgisayarlı Tomografi (BT) taramaları ilk sırada yer alırken, nükleer tıp ikinci sırada yer almaktadır. Tabii ki, maruz kalan doku ve dolayısıyla organlar tarafından emilen doz, sağlığa yönelik risklerle doğru orantılıdır. Nükleer tıpta tedavi amaçlı vücuda yerleştirilen radyoizotoplar nedeniyle sadece tümörün bulunduğu organ ve/veya dokulara değil, çevredeki diğer organ ve dokular az miktarda olsa da doz absorbe eder. Bu çalışmada erişkin fantomların (erkek ve dişi) tiroid bezine yerleştirilen iyot radyoizotop I-131'in aktivitelerine göre tiroid bezi, timüs ve lenf bezlerinin aldığı dozlardaki değişim Monte Carlo-tabanlı NCINM kodu ile araştırılmıştır.There are many ways to be exposed to radiation in life. Medical applications, in particular, are the most important form of severe exposure. In medical applications, Computed Tomography (CT) scans are in the first place, while nuclear medicine is in the second place. Of course, the dose absorbed by the exposed tissue and therefore the organs is directly proportional to the risks to health. In nuclear medicine, due to the radioisotopes placed in the body for therapeutic purposes, some doses are not given only to the organ and/or tissues where the tumor is placed, but also to other surrounding organ and tissues. In this study, the change in the doses received by the thyroid gland, thymus, and lymph nodes according to the activities of the iodine radioisotope I-131 placed in the thyroid gland of adult phantoms (both male and female) were investigated with the Monte Carlo-based code

    Cerrahi yolla tedavi edilen el ve el bileği kitlelerinin değerlendirmesi

    Get PDF
    Amaç: El ve el bileği kökenli tümörler, Ortopedi ve Travmatoloji uzmanlarının sıkça karşılaştıkları durumlardır. Bu tümörler sıklıkla benign karakter taşımalarına karşın nadiren malign özellikte tümörlerle de karşılaşılabilir. Bu çalışmamızda; cerrahi tedavi için hastanemize yatan el ve el bileği tümörlü hastalar incelenmiştir. Gereç ve yöntem: 1985-2011 yılları arasında patolojik tanıları doğrulamış 379 hastanın 381 el ve el bileği kitlesi çalışmaya dahil edilmiştir. Hastaların; 213’ü kadın, 166’sı erkek ve yaş ortalamaları 30,8 olarak bulunmuştur. Sonuçlar: Tümörlerin 14 % 3,7 tanesi malign; 367 % 96,3 ’si ise benigndi. Malign tümörlerin görüldüğü ortalama yaş 42,3 ; benign tümörlerinki ise 30,6 olarak hesaplandı. Histopatolojik tetkik sonuçlarına göre en sık olarak görülen tümör, 117 olgu ile enkondrom olurken; ikinci sırayı 104 olgu ile ganglion, üçüncü sırayı 49 olgu ile osteokondrom almıştır. En sık görülen malign tümör 8 olgu ile kondrosarkom olmuştur. Yorum: El ve el bileği tümörlerinin sıklığı ve çeşitliliğine dair epidemiyolojik veriler oldukça kısıtlıdır. El ve el bileği yerleşimli kitleler, her Ortopedi ve Travmatoloji uzmanının karşılaşma ihtimali yüksek olan olgulardır. Bu tümörlerin çok büyük bir kısmı benign nitelikte olsa da; malign tümörlerin de görülebileceği unutulmamalıdır. Bu çalışmamızın; el ve el bileğinde görülen kitlesel lezyonların, tanı ve tedavisi açısından Ortopedi ve Travmatoloji ile uğraşan meslektaşlarımıza faydalı olacağına inanmaktayı

    Reply to the Letter to the Editor Art in Science: Orthopaedics Through Philatelic Material

    No full text
    WOS: 000330976400046PubMed ID: 2444283

    Two Column Bases from Mawan in the Hakkâri Province (Southeast corner of Turkey): A new Achaemenid Center?

    No full text
    Bell-shaped column bases are common finds from the Achaemenid Empire centers. These centers were governed either by Persians or local administrators who were dependent on Persia. Two bell-shaped column bases were found in the village of Mawan, 32 km from Şemdinli district of Hakkâri province in Turkey. These column bases are the first Achaemenid finds from the Hakkâri province. Mawan is situated at an important transit point between north-western Iran, eastern Anatolia and northern Iraq. At this point, it is necessary to draw attention to a widespread garrison network of the Achaemenid Empire in the region. Therefore, it is possible to consider the location of the Mawan column bases as the site of a garrison rather than an administrative center

    Art in Science: Orthopaedics Through Philatelic Material

    No full text
    WOS: 000327083800007PubMed ID: 2407262

    Pure elbow dislocation in the paediatric age group

    No full text
    WOS: 000371084600017PubMed: 26686496Purpose The main purpose of the present study was to evaluate the clinical results and prognosis of pure elbow dislocations in the paediatric age group following non-surgical treatment. Methods Acute traumatic pure elbow dislocations treated between January 2008 and January 2013 were evaluated. The median age was eight years. The mean follow-up time was 46 months. Active and passive range of motion (ROM), elbow stability, neurovascular status, functional status and any early or late complications were evaluated and recorded at the latest follow-up. Results The mean flexion-extension ROM was measured as 119.5 degrees. The mean pronation and supination were 67 and 79 degrees. Moderate instability was diagnosed in four cases. The mean Mayo Elbow Performance Score (MEPS) score was 91.6 points; the clinical outcome was excellent in nine patients, good in two and fair in one. Conclusions Acute traumatic pure elbow dislocation in childhood is a very rarely seen emergency that can be treated safely with closed reduction combined long-arm plaster splinting and physical rehabilitation

    Isolated Subtalar Arthrodesis

    No full text
    The purposes of this study were to review the results of isolated subtalar arthrodesis in adults, to make a comparative analysis of the clinical outcomes between the patients with posttraumatic subtalar arthritis and the ones with other etiologic factors, and to evaluate the effects of grafting.The patients included 17 men and 10 women. The mean postoperative follow-up was 33.1 months. The mean AOFAS hindfoot score improved from a mean of 46.7 preoperatively to a mean of 78.4 postoperatively. Twenty-seven of 29 arthrodeses achieved bony union at a mean time of 15.5 weeks. The mean increase in the talocalcaneal height was m 3.7 mm in the feet without grafting, whereas it was 8 mm in the feet for which grafting was performed. Improvement in talocalcaneal angle was significantly worse in the feet with posttraumatic arthritis. The feet with posttraumatic subtalar arthritis were more prone to Reflex Sympathetic Dystrophy.

    Tonnis triple pelvic osteotomy for Legg-Calve-Perthes disease

    No full text
    WOS: 000350369800017PubMed: 25417791Purpose The aim of this study is to evaluate the efficacy of Tonnis triple pelvic osteotomy in patients with LCP disease. Methods Between 2007 and 2011, Tonnis triple pelvic osteotomy was performed for 43 patients with LCP, in our institute. During the follow-ups of patients with LCP the indications for the surgery were lateralization of the femoral head, insufficient femoral head coverage and subluxation of the femoral head. The mean age of patients at the time of surgery was 9.4 years. Results Before surgical intervention, according to Waldenstrom classification, three patients were in the necrosis stage (7 %), six patients in the fragmentation stage (13.9 %), 16 patients in the re-ossification stage (37.2 %) and 18 patients in the remodeling stage (41.9 %). According to Herring classification, four patients were in group B (9.3 %), one patient in group B/C (2.3 %) and 38 patients in group C (88.4 %). After the operation, patients were evaluated with Stulberg classification, and good outcome (Stulberg I/II) was achieved in 23 patients (53, 5 %), fair outcome (Stulberg III) in 16 patients (37, 2 %) and poor outcome (Stulberg IV/V) was seen in only four patients (9.3 %). The mean value of CEA was 0.37 degrees pre-operatively and in the last follow-ups the mean value of CEA was 23.7 degrees. Conclusions We recommend triple pelvic osteotomy for patients with LCP when conservative methods are not successful. According to our results we believe that Waldenstrom classification is a better option than Herring classification to determine the prognosis of disease after containment surgery
    corecore