<prompt> Which is not a deep heat therapy-Short wave diathermyUltrasound therapyInfrared therapyMicrowave therapy  <response>: Heat therapy Heat therapy is a form of physiotherapy used in many painful conditions eg. arthritis, sprains, muscle spasms etc.It is of 2 types depending on the penetration of heatSuperficial heat therapyDeep heat therapyA Superficial heat therapyOnly the skin and subcutaneous tissues are heatedSuperficial heating modalities do not heat deep tissue because the subcutaneous layer of fat beneath the skin surface acts as a thermal insulator and inhibits heat transfer.Superficial heating modalities include :Hot warm bottle Warm bath Hot packs eg. Kenny packHot soaks or compressesParaffin wax bath Moist air cabinetChemical packsInfrared lampB Deep heat therapyDeeper structures including muscles are heatedIn general, the transfer of heat is of three types- conduction, convection conversion or radiationWhereas superficial heating modalities use all three modes of transfer of heat; deep heating modalities use only conversion or radiation method to heat the deep tissues.Deep heating modalities area Shortwave diathermyHeat generated by high-frequency alternating current using a shortwave diathermy emitter.b Microwave diathermyThis uses electromagnetic radiation energy to heat the deep tissuesc Ultrasound therapyUses high-frequency sound energy 