NMD-14

Standardised uptake value

SUV = C W / A. Concentration times body weight over injected activity.

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QuantificationSUV

Governing equation

\mathrm{SUV}=C\,W/A

$C \in \left[0.1, 80\right]$

where

C: Tissue concentration (kBq/ml)
W: Body weight (kg)
A: Injected activity (MBq)
SUV: SUV (g/ml)

The figure, part by part

Each numbered marker wears the color of its card. Hover a card to light the marker. Tap a marker to jump to that card. The slider walks a red point along the curve; Animate drawing traces it like a pen.

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①

Governing law — red

\mathrm{SUV}=C\,W/A

$C \in \left[0.1, 80\right]$

$C = 0.1$ $SUV = 0.019$

Along the curve

②

Domain of the variable — blue

C_{\min} = 0.1,\quad C_{\max} = 80

$C \in \left[0.1, 80\right]$

$C = 0.1$ $C = 0.1$

Along the curve

③

Response curve — green

\mathrm{SUV}=C\,W/A

$C \in \left[0.1, 80\right]$

$C = 0.1$ $SUV = 0.019$

Along the curve

④

Rate of change — amber

\frac{\mathrm{d}SUV}{\mathrm{d}C}

$C \in \left[0.1, 80\right]$

$C = 0.603$ $SUV^{\prime} = 0.189$

Along the curve

Lecture brief

Historical brief

MIRD schema, in-vivo decay, uptake fractions and PET coincidence turned unsealed sources into organ dose. The sheets compute activity, residence and well-counter geometry. This sheet (NMD-14 — Standardised uptake value) is the form associated with SUV. Working symbols: $C$ , $W$ , $A$ $\rightarrow$ $SUV$ . Units: C in kBq/ml, W in kg, A in MBq → g/ml. SUV is 1 if the tracer spreads uniformly in 1 g/ml tissue.

Purpose

Purpose: compute

SUV

from

C

W

A

in Nuclear medicine via

\mathrm{SUV}=C\,W/A

SUV = C W / A. Concentration times body weight over injected activity. Use it when a real nuclear medicine question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

C = 12.000\,\mathrm{kBq/ml}

W = 70.000\,\mathrm{kg}

A = 370.000\,\mathrm{MBq}

, the governing relation

\mathrm{SUV}=C\,W/A

yields

SUV = 2.27\,\mathrm{g/ml}

. A VOI concentration normalised to the injection. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Tissue concentration C12 kBq/mlBody weight W70 kgInjected activity A370 MBq

Outputs

SUV SUV2.27 g/ml

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Narration of this film

A VOI concentration normalised to the injection.

Units: C in kBq/ml, W in kg, A in MBq → g/ml. SUV is 1 if the tracer spreads uniformly in 1 g/ml tissue.

Reading speed

Watch on YouTube