There are multiple definitions:

1. transcranial Doppler [ultrasound](English)

   • allows vascular assessment of a more representative proportion of patients than does conventional angiography alone. Used to measure cerebral blood velocity at the middle cerebral artery
   • FV, MCA, TIA, TCCD
   • Doppler technique, Brain (dys)function, Hemodynamics, Ultrasound
   • https://doi.org….1982.57.6.0769
   • https://doi.org….str.27.11.1974
   • https://doi.org/10.1113/ep092060

2. transverse cardiac diameter(English)

   • see cardiomegaly
   • CTR
   • Radiology, Cardiology
   • https://www.ncb…les/PMC5579422/

3. T-cell depletion(English)

   • ex vivo HSCT type affords curative therapy with minimal GVHD in older adults
   • GVHD, HSCT
   • Transplantation
   • https://doi.org…bmt.2017.06.024

4. total cumulative dose(English)

   • AX, CX, DPT, IgE, IHR, MDM, PPL, PV, RAST, ST
   • Microbiology, Allergy
   • https://doi.org…601-020-00368-1

5. transcerebellar diameter(English)

   • its incorporation and the use of new formulas in late pregnancy ultrasound scans could improve the accuracy of gestational age estimation in both appropriate-for-gestational-age and small-for-gestational-age infants in LMIC
   • CRL, LMIC
   • Pregnancy, Neonatal situation, Ultrasound
   • https://doi.org…109X(20)30473-3