Abstract
Microwave thermometry is a noninvasive and passive technique for measuring internal body temperature. Wearable compact antennas, matched to the specific body area, are required for this method. We present a new epidermal wideband antenna for medical radiometry. The double asymmetric H-shaped slot antenna was designed to be matched to different parts of the body without fat layers. The slots are fed by a short-circuited microstrip line in order to decrease size and back radiation, thus reducing potential interferences. In this way, contribution to radiometric temperature due to back radiation is lower than 4%, versus the 20% of the volume under investigation, over the whole operating frequency band. The designed prototype was manufactured on a flexible substrate. The antenna is a very small size, to make it comfortable and suitable for being used by patients with different body mass indexes. The double H-shaped antenna shows good wideband matching results from around 1.5 GHz up to 5 GHz, in different body locations such as the neck, foot instep and foot sole.
Highlights
Medical Microwave Radiometry (MMR) is a low-cost, non-ionizing, non-invasive procedure for medical diagnosis
The analysis of any anomalous temperature variation measured using these systems could help in the assessment of a medical complication or pathology
MMR has already been applied to cancer detection [1], cancer treatment [2], hyperthermia temperature control [3], human core temperature tracking [4], atherosclerosis in the human carotid [5] and the diagnosis of arterial disease in diabetic patients [6]
Summary
Medical Microwave Radiometry (MMR) is a low-cost, non-ionizing, non-invasive procedure for medical diagnosis. In order to increase the efficiency on-body matched antennas are chosen for medical diagnosis [10,11,12,13] and for Wireless of the measurement system, most communications of these designs have a reflector thethe backward radiation. Wideband epidermal antennas help measurement system, most of these haveMoreover, a reflector to reduce the backward radiationcan [10,14], MMR, since they can be used to measure below skin surface in multiband applications [3] MMR applications, with the goal of evaluating diabetic foot [6] or carotid artery diseases associateda short-circuited stubtemperature to body regions without layers, and the design does require reflector with subcutaneous anomalies [5]adipose .
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