IMPACT OF THREE DIFFERENT MATCHING METHODS ON PATIENT SET-UP ERROR IN X-RAY VOLUMETRIC IMAGING FOR HEAD AND NECK CANCER

Impact of three different matching methods for delivery of Volumetric Modulated Arc Therapy (VMAT) in Cone-beam computed tomography (CBCT) on patient set-up error. As per institutional imaging protocol, 300 CBCT scans of 20 VMAT head and neck cancer patients treated with 60 Gy/30 fractions were chosen for the present study. Approved CT images of the plan were registered as a reference with the CBCT images on board. Grey-scale matching (GM), manual matching (MM), and bone matching (BM) between on-board CBCT and reference CT images were used to assess patient translation errors. Patient positioning verification was evaluated using the Clip-box registration in all three matching methods. Using the GM approach as a reference point, two additional matchings were rendered in offline mode using BM and MM. For analysis, random error (σ), systematic error (∑), maximum error (E) mean set-up error (M), mean displacement vector (R), matching time (Mt), and multiple comparisons using Post hoc Tukey's HSD test were performed. In MM, less random and systematic errors were found than in GM and BM with an insignificant difference (p > 0.05) Compared to BM and GM, the maximum error, mean set-up error, and displacement vector were marginally less in MM (p > 0.05). In MM, an increased Mt relative to BM and GM was observed (p > 0.05). Furthermore, an insignificant difference in set-up error was revealed in a multiple comparison test (p > 0.05). Any of the three matching methods can be used during CBCT to check patient translation errors for the delivery of the VMAT head and neck patients.

The extent and nature of coverage of mental health issues in printed media in India

CONTEXT

The term media on a whole pertain to the main method of mass communication. The chief aim of the media is communication, with the objective of educating, informing, and entertaining the audience. It is unknown how accurately the media reports the topics related to mental health issues.

AIMS

The aim of this study is to explore the extent and nature of coverage of mental health issues in printed media.

SETTINGS AND DESIGN

Data collection for the present study was conducted at the Library Gian Sagar College of Nursing, Ram Nagar, District Patiala, Punjab, in January 2017. A quantitative research approach with exploratory research design was adopted to explore the extent and nature of coverage of mental health issues in printed media.

SUBJECTS AND METHODS

By purposive sampling technique, 923 printed media from which a sample of 839 articles was drawn, i.e., N = 839 (N ₁ for newspapers, N ₁ = 827 and N ₂ for magazines, N ₂ = 12) with the help of search terms which consisted of 32 general and diagnostic terms covering the full range of mental disorders.

STATISTICAL ANALYSIS USED

Descriptive statistics were used.

RESULTS

One hundred and ninety-three (23%) articles on mental health issues appeared in the city/region section. Two hundred and one (32%) articles in newspapers did not mention the author. The most common theme of articles in newspapers was suicide 169 (25%) followed by substance abuse 209 (20%). The neutral description was used by 589 (71%) of all articles.

CONCLUSIONS

Majority of the articles appeared in the city/region section with neutral/nature.