There are multiple definitions:

1. mean transit time(English)

   • the average amount of time blood—or a drug—spends passing through a specific tissue volume or circulatory compartment.
   • CBF
   • Diagnostics, Hemodynamics
   • https://radiopa…ransit-time-mtt

2. 3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide [assay](English)

   • a colorimetric reaction that can easily be measured from cell monolayers that have been plated in 35 mm dishes or multiwell plates
   • DCM, DLS, DMXB, EE, FITC, FTIR, CVC, GYZ, LE, NHS, PDI, PEG, PLGA, RGD, SCGE, SDS, TAC, TEM, TOS
   • Clinical chemistry, Mitochondrion, Oncology
   • https://doi.org…63390-5.50010-7
   • https://doi.org….20141124062203
   • https://doi.org…int.2007.04.002
   • https://doi.org…90/ijms18040815

3. metyrapone test(English)

   • a diagnostic procedure used to evaluate the Hypothalamic-Pituitary-Adrenal axis. It specifically measures the pituitary gland's ability to produce Adrenocorticotropic Hormone (ACTH) in response to a physiological stressor
   • ACTH, CST, HPA, ITT, OMT
   • Pituitary (gland), Surgery, Endocrinology, Cortisol
   • https://doi.org…08.12.JNS081265

4. meal tolerance test(English)

   • ELISA, GIP, GLP-1
   • Nutrition
   • https://doi.org…endo.2020.00214

5. multimodality tissue tracking(English)

   • on cardiac magnetic resonance imaging, the gold-standard reference in atrial and ventricular volume measurement, and a wellestablished method for the assessment of cardiac deformation
   • AF, CMR, LA, LAEF, LAS, LV, MRI, MVR
   • Medical imaging, Cardiology, Biophysics
   • https://doi.org…93/ehjci/jez176

6. multi-task transformer(English)

   • a module designed to enhance the spatial global contextual representation of task features through a self-attention mechanism
   • BCE, DSC, EDF, ESF, FPS, HD, LOA, LP, LVEF, LVESV, MAD, MLP, PCK, PELoA, PLANeT, STP
   • Medical imaging, Machine learning
   • https://doi.org…517-025-03510-y