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[en] In methodical recommendations described are the problems of the technique for investigations, measurement metrology and estimation of the diagram material quality while neutron logging using serial equipment. Much attention is given to the methods of individual interpretation of neutron logging data and to the processing of the results obtained by ''hand interpretation''. The set of pallets for the main serial equipment of the commersial use is given
PurposeThis study was designed to compare the observed risk of femoral fracture in primary soft-tissue sarcoma (STS) of the thigh/groin treated with intensity-modulated radiation therapy (IMRT) to expected risk calculated using the Princess Margaret Hospital (PMH) nomogram.
MethodsExpected femoral fracture risk was calculated by using the PMH nomogram. Cumulative risk of fracture was estimated by using Kaplan–Meier statistics. Prognostic factors were assessed with univariate and multivariate analysis using Cox’s stepwise regression.
ResultsBetween February 2002 and December 2010, 92 consecutive eligible patients were assessed. Median follow-up was 73 months (106 months in surviving patients). IMRT was delivered preoperatively (50 Gy) in 13 (14%) patients and postoperatively in 79 (86%) patients (median dose, 63 Gy; range, 59.4–66.6 Gy). The observed crude risk of fractures was 6.5% compared with 25.6% expected risk from the nomogram; the cumulative risk of fracture using IMRT at 5 years was 6.7% (95% CI 2.8–16.0%). The median time to fracture was 23 months (range, 6.9–88.6). Significant predictors of fracture on univariate analysis were age ≥ 60 years (p = 0.03), tumor location in the anterior thigh (p = 0.008), and periosteal stripping to > 20 cm (p < 0.0001). On multivariate analysis, age ≥ 60 years and periosteal stripping > 20 cm retained significance (p = 0.04 and p = 0.009, respectively).
ConclusionsIn this study, the cumulative risk of femur fracture in patients treated with IMRT (6.7%) is less than the expected risk using the PMH nomogram (25.6%). Established predictors of femur fracture, such as gender, tumor size, and dose of RT, seem to have less impact on fracture risk when using IMRT.
[en] BackgroundThe prognosis of brain metastases (BM) in colorectal cancer (CRC) is extremely poor, but the incidence is increasing. The performance of existing prognostic classifications such as recursive partitioning analysis (RPA) and graded prognostic assessment (GPA) has never been evaluated in this specific setting. Moreover, the development of nomograms for estimating survival in such patients could be extremely helpful for treating physicians.
[en] On the basis of the error minimization criterion for the index determination in relation to the accumulation, proposed is the method of β-radiometry optimization for radioisotope diagnosis of neoformations of different localizations with 32P indicator. The parameters optimized are minimum general time of the measurement, maximum and minimum permissible quantity of the intravenously introduced indicator, type and parameters of the β-radiometer detector and the threshold of the energy discrimination
[en] Nomograms are constructed and described suitable for the unified presentation of the already used pallets and permitting the processing of the data of the borehole-mounted gamma-defectometer with the aim to determine substance density in a tube-exterior space and column eccentricity in a borehole. The processing of the cementograms with the aid of the improved method reduces to minimum preliminary calculations. It is also possible to cut down the processing time by several times
[en] By means of coda waves and broad band digital data a nomogram is constructed in order to calculate magnitudes of Caucasian earthquakes. It enables us to have a uniform catalogue of earthquakes from 1955 up to now. (author)
[en] Highlights: • Radiation-induced lung injury after SBRT was various and complicated. • The complicated injury patterns may induce misdiagnosis in clinical practice. • Our data showed that 24.5% patients were misdiagnosed after receiving SBRT. • Based on Koening’s classification, mass-like pattern was misdiagnosed the most. • A nomogram was developed and showed a predictive value in clinical practice. - Abstract: PurposeTo analyze radiation-induced lung injury (RIL) after stereotactic body radiotherapy (SBRT) of lung cancer and the subsequent clinical problems.