Benefits expected from simple conformal radiotherapy in the treatment of pelvic tumours

Tait, Diana; Nahum, Alan E.; Southall, Clea; Chow, M.; Yarnold, John

doi:10.1016/0167-8140(88)90294-0

Cited by 22 publications

(3 citation statements)

References 16 publications

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“…The cycle of radiation treatment was carried out according to the following schedule: (2 Gy/day × 5 days) × 5 weeks for a total of 50 Gy. Similar doses and times have been reported by other authors 5,6 …”

Section: Case Reportmentioning

confidence: 99%

Superselective embolization of bladder arteries in the treatment of intractable bladder haemorrhage

E¹,

Vicini²,

Salvatori

et al. 2005

Int J of Urology

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Bladder hemorrhage following radiation therapy is a serious complication in patients undergoing this treatment. Several methods have been proposed to control this particular situation; however, results have been far from satisfactory, with the exception of drastic measures such as hypogastric artery ligation and radical cystectomy. We recently used a method of superselective embolization of the bladder arteries which enabled us to control severe intractable bleeding in a patient submitted to bladder irradiation for a transitional cell infiltrating carcinoma. Compared to selective embolization and other methods, the advantages of superselective embolization are a lower recurrence rate concerning bleeding, fewer side-effects and the possibility of using adaptable embospheres (150-1000 micron) which, on account of their marked plasticity, offer better occlusion of the vessels. For these reasons, superselective embolization of the bladder arteries should be considered as the treatment of choice in intractable bladder hemorrhage.

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Section: Case Reportmentioning

confidence: 99%

Superselective embolization of bladder arteries in the treatment of intractable bladder haemorrhage

E¹,

Vicini²,

Salvatori

et al. 2005

Int J of Urology

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“…Today, the MLC is used in a wide variety of designs. The cost effectiveness of the MLC has been often questioned, 25 but recent data suggest that modern treatments using three dimensional ͑3D͒ conformal treatment planning and MLC could provide superior cost effective treatment. 1, 26,27 There are two approaches to MLC design: ͑a͒ multiple leaves as an add-on secondary collimator and ͑b͒ multiple leaves as a replacement of one of the main collimators.…”

Section: Introductionmentioning

confidence: 99%

Beam characteristics of a retrofitted double‐focused multileaf collimator

et al. 1998

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Multileaf collimators (MLCs) are generally believed to be convenient and cost-effective tools for intensity modulation and conformal therapy. They are becoming a standard feature on new accelerators; however, the older units can be retrofitted with modern MLCs. Before such a unit can be clinically used, the beam characteristics must be verified. In this study the beam characteristics of a Siemens double-focused MLC retrofitted to an MD2 linear accelerator are presented. The head leakage along with inter- and intra-leaf radiation transmission were measured using film. The collimator (Sc), phantom (Sp), total (Scp) scatter factors, central axis depth dose, beam profiles for off-axis ratios, penumbra, and surface dose were evaluated for square, rectangular, and irregularly shaped fields. The maximum head leakage was estimated to be < 0.05% in any plane at a distance of 1 m and maximum transmission through the MLC leaves was estimated to be < 1.4% and < 1.1% for the 10 MV and 6 MV beams, respectively. The maximum differences between pre- and post-MLC installation data for the Sc and Scp were < or = 0.7% and < or = 1.4%, respectively. Similarly, the percent depth dose data for all fields and both beam energies were within 1.5% of the original data. The beam profiles measured at various depths were also in agreement with those of the pre-MLC installation data. The measured beam penumbra (20%-80%) showed a range of 7.8 mm-11.0 mm for the 6 MV and 8.4 mm-11.1 mm for the 10 MV beams from smallest to largest fields. These ranges differ by less than a millimeter from those of the old data. The surface dose measurements were slightly lower than the conventional jaw values suggesting that MLC does not produce significant electron contamination. It is concluded that the retrofitted MLC maintains the integrity of the original beam and may provide a cost-effective conformal therapy.

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“…L'invention du scanner par Hounsfeld, en 1973, va radicalement changer la destiné e de la radiothé -rapie moderne. En 1990, le traitement par les radiations ionisantes, basé sur l'analyse de l'image scanner et l'utilisation de nouveaux logiciels informatiques de dosimé trie, prend le nom de radiothé rapie conformationnelle en trois dimensions (RC3D) [17]. C'est en 2000 que la RC3D se combine avec la modulation de l'intensité du faisceau d'irradiation (RCMI).…”

Section: Rappel Historiqueunclassified

De la radiothérapie conventionnelle á l’utilisation de la robotique: des évolutions technologiques et une révolution des pratiques

2009

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From conventional radiation therapy to robotic approach: technological evolution and revolution of practice Abstract: Since the discovery of X-ray by Rö ntgen in 1895, the technological evolution of radiation therapy increased swiftly. However, the philosophy remained always the same: delivering higher radiation dose to the target volume while decreasing the dose to the organ at risk. Since the beginning of the 1990s, with conformal radiation therapy development (3DCT), differents techniques appeared. Some of them are derived from 3DCT, such as intensity-modulated radiation therapy, arctherapy, Tomotherapy TM , or techniques using gating approach for breath holding. In the frame of stereotactic radiation therapy, the GammaKnife TM is already used since 20 years, while new concepts, based on a robotic approach (CyberKnife TM ), are now available for treatment. Brachytherapy also took advantage from the technological evolution with the new approaches. In the frame of heavy ions, hadrontherapy represents an interesting technique dedicated to special clinical situations including pediatric tumors. In this article, we report an analysis of the technological evolution of radiation therapy.

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Benefits expected from simple conformal radiotherapy in the treatment of pelvic tumours

Cited by 22 publications

References 16 publications

Superselective embolization of bladder arteries in the treatment of intractable bladder haemorrhage

Superselective embolization of bladder arteries in the treatment of intractable bladder haemorrhage

Beam characteristics of a retrofitted double‐focused multileaf collimator

De la radiothérapie conventionnelle á l’utilisation de la robotique: des évolutions technologiques et une révolution des pratiques

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