P J Compaan

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The cure rate in childhood cancer has improved markedly during the past 20 years. In the 1960s the cure rate was about 20 to 30 per cent, but today more than 50 per cent of children and adolescents with cancer are being cured. This improvement is principally due to multidisciplinary teamwork in diagnosing, staging, and treating children with cancer; newer(More)
An adjustable portal film cassette holder has been designed and constructed. The holder provides for: holding portal film perpendicular to and centered with the central axis of the beam film-to-patient distance to minimize magnification; angling (swivel) film to match collimator angle; and ease of correct repositioning of arrangement when frequent filming(More)
The NSD (nominal standard dose) concept has been useful in therapy for comparing various radiation treatment schedules. More recently, TDF (time, dose, and fractionation) factors were introduced. By incorporating treatment schedules (time and fractionation) with isodose summations, TDFs can be determined throughout the patient contour, including tissue in(More)
In the third National Wilms' Tumor Study (NWTS-3), patients with Stage II favorable histologic type (FH) or Stage III FH Wilms' tumor were randomized according to a factorial design for both radiation therapy (RT) and chemotherapy to be given after nephrectomy. Patients with Stage II FH disease were randomized between 2000 cGy and no postoperative RT;(More)
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