Evidence map›Paper›PMID 32039093›Full record

ArticleJournal of biomedical physics & engineering2019

Validation of the Gel & Wax Boluses and Comparison of their Dosimetric Performance with Virtual Bolus.

T R Verma, N K Painuly, M Tyagi, D Johny, R Gupta, M L B Bhatt

Abstract read
In one paragraph

Article in Journal of biomedical physics & engineering, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

T R VermaPhD, Department of Radiotherapy, King George's Medical University, UP, Lucknow, India.
N K PainulyPhD, Department of Radiotherapy, King George's Medical University, UP, Lucknow, India.
M TyagiMSc, Department of Radiology &amp.
D JohnyMSc, Department of Radiotherapy, King George's Medical University, UP, Lucknow, India.
R GuptaMD, Department of Radiotherapy, King George's Medical University, UP, Lucknow, India.
M L B BhattMD, Department of Radiotherapy, King George's Medical University, UP, Lucknow, India.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn general, radiotherapy treatment planning is performed using the virtual bolus. It is necessary to investigate physical bolus in comparison to virtual one.

objectivesIn the present study, first, radiological properties of superflab Gel bolus and Paraffin wax bolus was investigated in terms of their relative electron density. Then, dosimetric performance of both the bolus (i.e. Gel and Parafin wax) was compared with Virtual bolus. MATERIAL AND

methodsIn This experimental study, the radiological property of Wax and Gel boluses was investigated using two methods. In one, the relative electron density of both the Gel and Wax boluses was calculated by measuring their linear attenuation coefficient where in another method relative electron density was calculated by recording their CT No directly from their CT scan. Later CT scan of solid water slab phantom (dimension 30x30x15 cm

resultsThe measured (calculated) relative electron density of wax and Gel bolus was found to be 0.958 (0.926) and 0.923 (0.907), respectively. Variation in dosimetric performance of Gel and Wax with reference to Virtual bolus was studied. However, on average, Gel bolus was more consistent with virtual bolus.

conclusionTo avoid any dose difference between, delivered (using physical bolus) and planned (using virtual bolus), the physical boluses should be investigated for their dosimetric performance in comparison to virtual bolus. The results obtained and methodology used in this study can be applied in routine radiotherapy practices.

Indexed as

ImagingParaffinTomographyWaxesX-Ray Computed

Identifiers

PMID32039093
PMCPMC6943845

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