Therac 25 放射治疗仪

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August undefined, 2024

WebbTherac-25及其功能简介 Therac-25属于第三代医用高能电子线性加速器，具有两种工作模式。其一是加速电子模式，用来治疗相对较浅的病变。其二是X射线模式，这种模式，将25兆电子伏特的电子束，转化为X射线，用来治疗较深度的病变。台设备都重用了Therac-6的主要控制软件。 PDP11计算机控制软件的界面 Therac-25的软件控制系统的特征 1）按定 … WebbTherac-25是Atomic Energy of Canada Limited所生产的一种辐射治疗的机器。由于其软件设计时的瑕疵，致命地超过剂量设定导致在1985年6月到1987年1月之间，六件已知的 …

Caso clásico de error de software fatal: accidente médico Therac-25 …

Webb5 juli 2024 · The Therac-25 operated in two modes: low power mode and high power mode. Low power mode used an electron beam that didn’t penetrate too deeply, making it perfect for treating skin cancers. High power mode used x-rays to penetrate more deeply and treat bone or lung cancers. Webb8 maj 2024 · Therac-25: the killer radiation machine. In 1982 a machine called Therac-25 created by the Atomic Energy of Canada Limited (AECL) appeared in the medical field for cancer treatments, using radiation and x-rays. This machine was an improvement of the Therac-20 and cost approximately 1 million dollars. The machine worked well in most of … highlighter spanish

GAMBADAS: Therac-25, la máquina de radiación asesina

Webb1 dec. 2006 · History of the Therac-25 • Two companies, one in Canada and the other in France collaborated in the 1970s to build two linear accelerators (Therac-6 and Therac-20) to administer controlled doses of radiation for treatment of cancer. • Both machines were based on the French company’s prior designs. • WebbAls schließlich das System der Therac-25 näher untersucht wurde, wurden einige Schwachstellen, vor allem an der Software aufgedeckt. Als Basis diente ein selbst-programmiertes Echtzeit-Betriebsystem "32K PDP 11/23". Dieses Betriebsystem unterstützte präemptives Scheduling von kritschen und nichtkritischen Tasks. WebbTherac-25 – stosowana w latach 80. maszyna do radioterapii nowotworów; były one produkowane przez Atomic Energy of Canada Limited przy współpracy z francuską firmą CGR. W latach 1985-1987, na skutek poważnych błędów w oprogramowaniu sterującym, urządzenia te były przyczyną przynajmniej sześciu wypadków, podczas których pacjenci … highlighter sims 4 cc

The Therac-25: 30 Years Later - IEEE Computer Society

WebbThe Therac-25 machine was a state-of-the-art linear accelerator developed by the company Atomic Energy Canada Limited (AECL) and a French company CGR to provide radiation treatment to cancer patients. The Therac-25 was the most computerized and sophisticated radiation therapy machine of its time. http://sunnyday.mit.edu/papers/therac.pdf highlighter squareWebbTherac-25 で再利用されたTherac-20 の制御ソフトウェア・モジュールに潜んでいたバグによって発生させられていたこの異常動作は，Therac-20 ではその設計が過剰照射をハード的に強制終了させるようになっていたために未然に防ぐことができたのである．他 highlighter stick amazon

"Webb18 jan. 2024 · ETCC泰勒医院1986年4月Therac 25 事故发生后，ETCC立即停止Therac 25工作，并通知AECL。 ETCC的医生立即对事故进行了仔细的调查。由于机器的女操作员能够确切记忆事故发生时设备实际操作过程，经过一段时间的努力，终于使错误信息‘Malfunction 54 ’信息得以重现。 " - Therac 25 放射治疗仪

Therac 25 放射治疗仪

WebbTherac-25. Therac-25 era uma máquina de radioterapia controlada por computador, muito moderna para sua época, por permitir a utilização do mesmo equipamento para a aplicação de diversas doses de radiação nos pacientes. Houve uma série de pelo menos 6 acidentes entre 1985 e 1987, nos quais os pacientes receberam overdose de radiação. Webb4 aug. 2024 · 2. Therac-25. Therac-25 adalah alat pengolah radiasi yang dapat digunakan untuk pengobatan pasien yang terkena penyakit kanker. Namun, perangkat lunak yang digunakan pada alat ini mengalami bug yang serius. Alat tersebut gagal berfungsi, bug pada software ini menyebabkan dosis radiasi yang meningkat hingga 10 kali lebih tinggi.

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WebbTherac-25 (с англ. — «Терак-25») — аппарат лучевой терапии, медицинский ускоритель, созданный канадской государственной организацией « Atomic Energy of Canada Limited [en] » (далее AECL) и запущенный в серию в 1982 году. WebbTherac-25 là máy xạ trị, hay máy gia tốc hạt tuyến tính dùng trong điều trị. Máy hoạt động bằng cách bắn chùm năng lượng phóng xạ vào một khu vực nhỏ nhất định để loại bỏ tế …

Webb10 aug. 2013 · Therac-25是一个在以前设计的基础上改进的治疗设备，该设备可能会发出两种射线:或者是一个低功耗的电子束或者是X射线。 Therac-25'的X射线是通过猛烈的高能电子束撞击到一块位于电子枪和患者之间的金属目标而产生的。第二项改进是对于更旧的Therac-20'电动保险联动装置采取软件控制的方式代替，做这项改进是因为软件被认为更 … Webb案例2：Therac 25 放射治疗仪 Therac 系列仪器是由加拿大原子能有限公司（AECL）和法国CGL公司联合制造的一种医用高能电子线性加速器，用来杀死病变组织癌细胞，同时使其对周围健康组织影响尽可能降低，Therac 25属于第三代医用高能电子线性加速器。

Webb6 dec. 2024 · 축소. 확대. # 상황1. 지난 1985년 캐나다의 의료기업체인 AECL이 암 종양 제거를 위한 방사선 치료기인 ‘테락 25 (Therac 25)’를 개발하여 상용화에 나섰다. 강한 방사선을 안전하게 제어할 수 있는 장치를 SW로 조종할 수 있도록 개발한 의료기였다. 하지만 SW 오류로 ... Webb4 okt. 2024 · Dihasilkan oleh Atomic Energy of Canada, Therac-25 adalah sebuah mesin terapi radiasi untuk membunuh sel-sel kanser. Disebabkan masalah pada perisiannya, mesin ini telah membunuh sekurang-kurangnya enam orang pesakit apabila berlaku lebihan pancaran radiasi secara tidak sengaja.

Webb22 maj 2015 · En el Therac-25 esto se dejó al criterio del software, que no detectaba bien esto debido a una condición de carrera en el programa. Para simplificarlo digamos que si el operador humano era muy rápido dándole al teclado, como había un contador de 1 byte que desbordaba, si la orden coincidía con ese momento no se detectaba la ausencia de …

The Therac-25 was a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 and Therac-20 units (the earlier units had been produced in partnership with Compagnie Générale de Radiologie (CGR) of France). It was involved in at least six … Visa mer The machine had three modes of operation, with a turntable moving some apparatus into position for each of those modes: either a light, some scan magnets, or a tungsten target and flattener. • A … Visa mer The six documented accidents occurred when the high-current electron beam generated in X-ray mode was delivered directly to patients. Two software faults were to blame. One, when the operator incorrectly selected X-ray mode before quickly changing to … Visa mer • Gallagher, Troy. THERAC-25: Computerized Radiation Therapy. Archived from the original on 2007-12-12. (short summary of the Therac-25 Accidents) Visa mer A commission attributed the primary cause to general poor software design and development practices rather than single-out specific coding errors. In particular, the software was … Visa mer • Computer ethics • High integrity software • IEC 62304 • Ionizing radiation Visa mer small piece porlockWebb10 juli 2024 · Therac-25及其功能简介. Therac-25属于第三代医用高能电子线性加速器，具有两种工作模式。其一是加速电子模式，用来治疗相对较浅的病变。其二是X射线模式， … highlighter stain on carpetWebbEn 1982 salió al mercado médico una máquina llamada Therac-25 que proporcionaba tratamiento tanto de radiación como de rayos X, según fuese necesario. Costaba cerca de un millón de dólares. La mayoría de las veces, el Therac-25 se comportó bien y administró correctamente el tratamiento a las pacientes con cáncer. small piece of toasted bread crossword clueWebbIl Therac-25 è stata una macchina per la radioterapia, prodotta dalla canadese AECL come succeditrice alle unità Therac-6 e Therac-20, realizzate inizialmente insieme alla … highlighter smoking pipeWebbTherac-25 var en strålbehandlingsmaskin som på grund av mjukvarufel utsatte minst 6 patienter för strålningsöverdoser mellan juni 1985 och januari 1987, med strålsjuka och i vissa fall död [1] som följd. [2]:18 Maskinen återkallades 1987 och genomgick genomgående designändringar, bland annat tillägget av hårdvaruskydd för att hantera … small piece of tooth broke offWebb15 feb. 2024 · The Therac-25 was the first entirely software-controlled radiotherapy device. As that quote from Jacky above points out: most such systems use hardware interlocks to prevent the beam from firing when the targets are not properly configured. The Therac-25 did not. The software included a number of key modules that ran on a PDP-11. small piece of steakWebbTherac-25支持两种射线模式，一种是X射线，一种是电子束，在正常的流程中，操作员依次从左上角输入到右下角，输入患者姓名、射线类型、射线能量等参数，最终光标会停到 … small piece trust.org.uk