Those two goals lead to different answers. For bone density, DEXA is not merely the best option \u2014 it is effectively the only one. For routine body composition tracking, it is frequently the wrong tool, and this guide explains why.<\/p>\n DEXA stands for Dual-Energy X-ray Absorptiometry. It passes two X-ray beams of different energy levels through the body. Because bone, lean tissue and fat absorb those energies differently, the scanner can separate the three.<\/p>\n It reports:<\/p>\n It is the reference standard against which other body composition methods are validated, and that reputation is deserved for what it measures.<\/p>\n DEXA requires a fixed installation, a shielded room and a licensed radiology setup. That limits where it exists:<\/p>\n Availability thins considerably outside major cities. If you are in a tier-2 or tier-3 city, expect to travel to the nearest large hospital or diagnostic centre. Scans generally require an appointment, and bone density scans often require a doctor’s referral depending on the facility.<\/p>\n There is no single national price. Cost varies with:<\/p>\n Call the specific centre and ask which scan type the quoted price covers, and whether a formal report is included. That single question resolves most of the confusion.<\/p>\n If your purpose is bone density, stop reading \u2014 you need DEXA. If your purpose is tracking muscle and fat, the comparison is genuinely more balanced than the “gold standard” framing suggests.<\/p>\n Two points from that table deserve emphasis.<\/p>\n Radiation limits repeat testing.<\/strong> The dose in a DEXA scan is low, but it is not zero, which makes it unsuitable for the six-to-eight-week tracking cycle that makes body composition data genuinely useful. BIA can be repeated as often as needed.<\/p>\n DEXA does not report body water or Phase Angle.<\/strong> For clinical applications involving fluid status \u2014 dialysis, cardiac failure, post-surgical monitoring \u2014 or nutritional assessment via Phase Angle, DEXA simply does not produce the output. This is why hospitals often run both.<\/p>\n![\"InBody](\"https:\/\/www.inbody.in\/blog\/wp-content\/uploads\/2026\/08\/inbody-370s-body-composition-analyzer.jpg\")
What DEXA Actually Does<\/h2>\n
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Where DEXA Is Available in India<\/h2>\n
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What Determines DEXA Scan Cost<\/h2>\n
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DEXA vs BIA for Body Composition: An Honest Comparison<\/h2>\n
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\n \n<\/th>\n DEXA<\/th>\n Professional BIA (e.g. InBody)<\/th>\n<\/tr>\n<\/thead>\n \n Bone mineral density<\/td>\n Yes<\/strong> \u2014 the only option<\/td>\n No<\/td>\n<\/tr>\n \n Fat and lean mass<\/td>\n Reference standard<\/td>\n 98% correlation with DEXA; 99% on six-frequency models<\/td>\n<\/tr>\n \n Radiation<\/td>\n Low-dose X-ray<\/td>\n None<\/td>\n<\/tr>\n \n Scan time<\/td>\n Typically 10\u201320 minutes<\/td>\n About 60 seconds<\/td>\n<\/tr>\n \n Body water compartments<\/td>\n No<\/td>\n Yes \u2014 intracellular and extracellular<\/td>\n<\/tr>\n \n Phase Angle<\/td>\n No<\/td>\n Yes, on clinical models<\/td>\n<\/tr>\n \n Visceral fat<\/td>\n Estimated from android region<\/td>\n Reported as level or area in cm\u00b2<\/td>\n<\/tr>\n \n Availability in India<\/td>\n Larger hospitals and diagnostic centres<\/td>\n Widely available \u2014 gyms, clinics, labs, hospitals<\/td>\n<\/tr>\n \n Appointment needed<\/td>\n Usually, often with referral<\/td>\n Frequently walk-in<\/td>\n<\/tr>\n \n Suitable for frequent repeat testing<\/td>\n Limited by radiation exposure<\/td>\n Yes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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