Publications by authors named "Sandeep Kansal"

6 Publications

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Dosimetric evaluation of different planning techniques based on flattening filter-free beams for central and peripheral lung stereotactic body radiotherapy.

Biomed Phys Eng Express 2021 Oct 12. Epub 2021 Oct 12.

Department of Radiotherapy, Government Medical College Patiala, Sangrur Road, Patiala, Punjab, 147001, INDIA.

This study aimed to dosimetrically compare and evaluate the flattening filter-free (FFF) photon beam-based three-dimensional conformal radiotherapy (3DCRT), intensity-modulated radiation therapy (IMRT), and volumetric modulated arc therapy (VMAT) for lungstereotactic body radiotherapy (SBRT). RANDO phantom computed tomography (CT) images were used for treatment planning. Gross tumor volumes (GTVs) were delineated in the central and peripheral lung locations. Planning target volumes (PTVs) was determined by adding a 5 mm margin to the GTV. 3DCRT, IMRT, and VMAT plans were generated using a 6-MV FFF photon beam. Dose calculations for all plans were performed using the anisotropic analyticalalgorithm (AAA) and Acuros XB algorithms. The accuracy of the algorithms was validated using the dose measured in a CIRS thorax phantom. The conformity index (CI), high dose volume (HDV), low dose location (D), and homogeneity index (HI) improved with FFF-VMAT compared to FFF-IMRT and FFF-3DCRT, while low dose volume (R) and gradient index (GI) showed improvement with FFF-3DCRT. Compared with FFF-3DCRT, a drastic decrease in the mean treatment time (TT) value was observed with FFF-VMAT for different lung sites between 57.09 % and 60.39 %, while with FFF-IMRT it increased between 10.78 % and 17.49 %. The dose calculation with Acuros XB was found to be superior to that of AAA. Based on the comparison of dosimetric indices in this study, FFF-VMAT provides a superior treatment plan to FFF-IMRT and FFF-3DCRT in the treatment of peripheral and central lung PTVs. This study suggests that Acuros XB is a more accurate algorithm than AAA in the lung region.
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http://dx.doi.org/10.1088/2057-1976/ac2f0dDOI Listing
October 2021

Radiological risk assessment to the public due to the presence of radon in water of Barnala district, Punjab, India.

Environ Geochem Health 2021 Jun 26. Epub 2021 Jun 26.

Department of Physics, Dr. B.R. Ambedkar, National Institute of Technology, Jalandhar, 144011, India.

Various research studies have shown that exposure to radon gas is a cause of concern for health effects to the public. The present work has been carried out for the radiological risk assessment to the public due to the presence of radon isotopes in drinking water of Barnala district of Punjab, India, for the first time using scintillation-based radiation detector. A total of 100 samples were collected from different sources of water (canal and underground water) from 25 villages on grid pattern of 6 × 6 km in the study area for uniform mapping. In situ measurements were carried out to find out Rn-222 concentration in water samples. The measured values have been found to vary from 0.17 ± 0.01 to 9.84 ± 0.59 BqL with an average value of 3.37 ± 0.29 BqL, which is well below the recommended limit of 100 BqL(WHO 2004). The annual effective dose due to ingestion and inhalation of radon has also been calculated for various age groups like infants, children and adults to understand the age-wise dose distribution. The calculated values suggest that there is no significant health risk to the general public from radon in water.
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http://dx.doi.org/10.1007/s10653-021-01012-yDOI Listing
June 2021

Dosimetry of a 6 MV flattening filter-free small photon beam using various detectors.

Biomed Phys Eng Express 2021 May 11;7(4). Epub 2021 May 11.

Department of Physics, Dr Bhimrao Ambedkar University, Agra, Uttar Pradesh, 282004, India.

The present study aimed to dosimetrically evaluate the small-fields of a 6 MV flattening filter-free (FFF) photon beam using different detectors.The 6 MV FFF photon beam was used for measurement of output factor, depth dose, and beam profile of small-fields of sizes 0.6 cm × 0.6 cm to 6.0 cm × 6.0 cm. The five detectors used were SNC125c, PinPoint, EDGE, EBT3, and TLD-100. All measurements were performed as per the International Atomic Energy Agency TRS 483 protocol. Output factors measured using different detectors as direct reading ratios showed significant variation for the smallest fields, whereas after correcting them according to TRS 483, all sets of output factors were nearly compatible with each other when measurement uncertainty was also considered. The beam profile measured using SNC125c showed the largest penumbra for all field sizes, whereas the smallest was recorded with EDGE. Compared with that of EBT3, the surface dose was found to be much higher for all the other detectors. PinPoint, EBT3, TLD-100, and EDGE were found to be the detector of choice for small-field output factor measurements; however, PinPoint needs special attention when used for the smallest field size (0.6 cm × 0.6 cm). EDGE and EBT3 are optimal for measuring beam profiles. EBT3, PinPoint, and EDGE can be selected for depth dose measurements, and EBT3 is suitable for surface dose estimation.
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http://dx.doi.org/10.1088/2057-1976/abfd80DOI Listing
May 2021

Thoracic psammomatous spinal meningioma with osseous metaplasia: A very rare case report.

Asian J Neurosurg 2017 Apr-Jun;12(2):270-272

Department of Surgery, Subharti Medical College, Meerut, Uttar Pradesh, India.

Thoracic spinal psammomatous meningioma is a rare subtype of meningioma. Among diverse types of mesenchymal differentiation, osseous metaplasia is found to be still rarer. We are presenting a new case of thoracic psammomatous spinal meningioma with osseous metaplasia in a middle aged female which that gives a sense of cancellous bone in the spinal canal. To conclude, meningiomas with osseous metaplasia are very rare tumors that complicate the surgical removal in certain cases. Ossification, if predicted prior to operation with computed tomography reconstruction, makes planning of removal easier. In our case, maintained cerebrospinal fluid spaces despite hard consistency of tumor made its removal easier once cerebrospinal fluid was drained. We have submitted this article because it is very rare and curable pathology and preoperative diagnosis helps in prevention of neurological injury during its excision.
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http://dx.doi.org/10.4103/1793-5482.150222DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5409385PMC
May 2017

Reverse pedicle-based greater saphenous neuro-veno-fasciocutaneous flap for reconstruction of lower leg and foot.

Eur J Orthop Surg Traumatol 2014 Jan 6;24(1):67-72. Epub 2013 Jan 6.

, A-27, Alok Park, Modinagar, 201204, Ghaziabad, UP, India,

Introduction: Paucity of soft tissue available locally for reconstruction of defects in leg and foot presents a challenge for reconstructive surgeon. The use of reverse pedicle-based greater saphenous neuro-veno-fasciocutaneous flap in reconstruction of lower leg and foot presents a viable alternative to free flap and cross-leg flap reconstruction. The vascular axis of the flap is formed by the vessels accompanying the saphenous nerve and the greater saphenous vein. We present here our experience with reverse saphenous neurocutaneous flap which provides a stable cover without the need to sacrifice any important vessel of leg.

Patients And Methods: The study is conducted from March 2003 through Dec 2009 and included a total of 96 patients with defects in lower two-thirds of leg and foot. There are 74 males and 22 females. Distal pivot point was kept approximately 5-6 cm from tip of medial malleolus, thus preserving the distal most perforator, and the flap is turned and inserted into the defect. Donor site is covered with a split thickness skin graft. Postoperative follow-up period was 6 weeks to 6 months.

Result: The procedure is uneventful in 77 cases. Infection is observed in 14 cases. Partial flap necrosis occurs in 2 cases. Total flap necrosis is noted in 3 cases.

Conclusion: Reverse pedicle saphenous flap can be used to reconstruct defects of lower one-third leg and foot with a reliable blood supply with a large arc of rotation while having minimal donor site morbidity.
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http://dx.doi.org/10.1007/s00590-012-1150-5DOI Listing
January 2014

Life time fatality risk assessment due to variation of indoor radon concentration in dwellings in western Haryana, India.

Appl Radiat Isot 2012 Jul 13;70(7):1110-2. Epub 2011 Dec 13.

Department of Applied Sciences, Giani Zail Singh College of Engineering & Technology, Bathinda 151001, India.

Indoor radon measurements in 60 dwellings belonging to 12 villages of Sirsa, Fatehbad and Hisar districts of western Haryana, India, have been carried out, using LR-115 type II cellulose nitrate films in the bare mode. The annual average indoor radon value in the studied area varies from 76.00 to 115.46 Bq m(-3), which is well within the recommended action level 200-300 Bq m(-3) (ICRP, 2009). The winter/summer ratio of indoor radon ranges from 0.78 to 2.99 with an average of 1.52. The values of annual average dose received by the residents and Life time fatality risk assessment due to variation of indoor radon concentration in dwellings of studied area suggests that there is no significance threat to the human beings due to the presence of natural radon in the dwellings.
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http://dx.doi.org/10.1016/j.apradiso.2011.11.057DOI Listing
July 2012
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