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The standardized uptake value (SUV) formulas are used in positron emission tomography (PET) analysis. Radiotracer concentration can be measured for any area-based region of interest (ROI) such as circle, square, polygon, etc. The SUV formulas depend on certain attributes in the DICOM image without which SUV values cannot be calculated.

OnePacs Web Viewer provides the following SUV types

Body Weight (SUV bw)
Body Surface Area (SUV bsa)
Lean Body Mass (SUV lbm)

N/A will be displayed in the event that SUV calculations are not available (e.g. due to missing DICOM attributes).

Web Viewer > Standardized Uptake Value (SUV) > image2018-6-22 16:31:14.png

SUV calculations can independently be shown/hidden by User Preferences

Required DICOM Attributes

General Tags

Tag	VR	VM	Description
(0010,0040)	CS	1	Patient’s Sex
(0010,1020)	DS	1	Patient’s Size
(0010,1030)	DS	1	Patient’s Weight
(0008,0021)	DA	1	Series Date
(0008,0031)	TM	1	Series Time
(0008,0022)	DA	1	Acquisition Date
(0008,0032)	TM	1	Acquisition Time
(0028,0051)	CS	1 - n	Corrected Image
(0054,1102)	CS	1	Decay Correction
(0054,1001)	CS	1	Units
(0028,1052)	DS	1	Rescale Intercept
(0028,1053)	DS	1	Rescale Slope

Radiopharmaceutical Information Sequence

Tag	Tag	VR	VM	Description
(0054,0016)		SQ	1	Radiopharmaceutical Information Sequence
	(0018,1074)	DS	1	Radionuclide Total Dose
	(0018,1078)	DT	1	Radiopharmaceutical Start DateTime
	(0018,1072)	TM	1	Radiopharmaceutical Start Time
	(0018,1075)	DS	1	Radionuclide Half Life

Manufacturer Tags

Tag	VR	VM	Description
(0009,100D)	TM	1	Scan Time for GE (private tag)
(7053,1000)	DS	1	SUV Scale Factor for Philips
(7053,1009)	DS	1	Activity Concentration Scale Factor for Philips

SUV formulas

Main Formulas
- Body Weight (SUV _bw)
  $PET Image Pixels \times \frac{Weight(g)}{Radionuclide Total Dose \times Decay Correction}$ [1]
- Body Surface Area (SUV _bsa)
  $PET Image Pixels \times \frac{BSA}{Radionuclide Total Dose \times Decay Correction}$ [1]
- Lean Body Mass (SUV _lbm)
  $PET Image Pixels \times \frac{LBM \times 1000}{Radionuclide Total Dose \times Decay Correction}$ [2]
Factors of Formulas
- Body Surface Area (BSA)
  $Weight(kg)^{0.425} \times Height(cm)^{0.725} \times 71.84$
- Lean Body Mass (Male)
  $(1.10 \times Weight(kg)) - (120 \times (\frac{Weight(kg)}{Height(cm)})^{2})$
- Lean Body Mass (Female)
  $(1.07 \times Weight(kg)) - (148 \times (\frac{Weight(kg)}{Height(cm)})^{2})$
- Decay Correction
  $2^{(\frac{-TimeGap}{Radionuclide Half Life})}$
- Time Gap
  $Scan Time - Radiopharmaceutical Start Time$
  If Decay Correction (0054,1102) is 'ADMIN', Time Gap is 0.
  If GE private tag presents, Scan Time is with its value.
- PET Image Pixels
  $Rescale Slope \times Pixels + Rescale Intercept$

[1]: Calculation of SUV _bw and SUV _bsa are according to the following equations, taken from Kim et al. Journal of Nuclear Medicine. Volume 35, No. 1, January 1994. pp164-167
[2]: Calculation of SUV _lbm is according to Sugawara et al. Radiology, November 1999. pp 521-525

Required DICOM Attributes

General Tags

Radiopharmaceutical Information Sequence

Manufacturer Tags

SUV formulas

Main Formulas

Body Weight (SUV bw)

[1]

Body Surface Area (SUV bsa)

[1]

Lean Body Mass (SUV lbm)

[2]

Factors of Formulas

Body Surface Area (BSA)

Lean Body Mass (Male)

Lean Body Mass (Female)

Decay Correction

Time Gap

PET Image Pixels

Body Weight (SUV _bw)

$PET Image Pixels \times \frac{Weight(g)}{Radionuclide Total Dose \times Decay Correction}$ [1]

Body Surface Area (SUV _bsa)

$PET Image Pixels \times \frac{BSA}{Radionuclide Total Dose \times Decay Correction}$ [1]

Lean Body Mass (SUV _lbm)

$PET Image Pixels \times \frac{LBM \times 1000}{Radionuclide Total Dose \times Decay Correction}$ [2]