CARE Right

Committed to ALARA

CARE Right
 
Bizle İletişime Geçin

Clinical Examples: Scanning with the right dose

CARE Right aims at finding the right dose for every individual patient. What matters is the right balance between image quality and radiation dose. All of CARE Right’s individual areas – Right Dose Technology, Right Dose Levels, and Right Dose Management – come together in the following examples.



Case 1: CT chest angiography pediatrics

SOMATOM Drive

Diagnosis: Coarctation of the aorta
(Image: Shandong Medical Imaging Research Institute / Shandong, P. R. China)


Used iterative reconstruction method: SAFIRE

Collimation: 128 x 0.6 mm70 kV, 130 mAs
Flash scan modeCTDIvol: 0.37 mGy
Scan time: 0.32 sDLP: 8 mGy cm
Scan length: 144 mmEff. dose: 0.35 mSv
Rotation time: 0.28 s 

 


Case 2: CT chest abdomen pelvis angiography

SOMATOM Force

Diagnosis: A re-evaluation CTA using only 20 mL of contrast media confirmed a Stanford B aortic dissection, beginning behind the junction of the left subclavian artery and stretching to just below the diaphragm, with a new partially thrombotic occlusion of the false lumen.
(Image: University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University)

Used iterative reconstruction method: ADMIRE
 

Collimation: 192 x 0.6 mm80 kV, 140 mAs
Flash scan modeCTDIvol: 2.09 mGy
Scan time: 0.91 sDLP: 154.6 mGy cm
Scan length: 673.6 mmEff. dose: 2.3 mSv
Rotation time: 0.25 s 

 


Case 3: CT abdomen pelvis

SOMATOM Perspective

Diagnosis: The radiologists found the right balance between applied radiation and image quality. As the habitus of the patient is larger than the reference patient, 5.6 mSv was the right effective dose to achieve this balance. CT images showed a cauliflower-like, broad-based soft tissue mass located on the left-posterior wall of the rectum. It measured 25 x 22 mm and was causing luminal narrowing.
(Image: Department of Radiology, Panshi City Hospital, Lilin, P. R. China)

Used Iterative Reconstruction Method: SAFIRE

Collimation: 64 x 0.6 mm110 kV, 86 mAs
Scan time: 13 sCTDIvol: 6.36 mGy
Scan length: 518 mmDLP: 374.27 mGy cm
Rotation time: 0.6 sEff. dose: 5.6 mSv

 


Case 4: Pediatric case

SOMATOM Definition Flash with Stellar detector

Diagnosis: Septum defect with impact on lung perfusion?
(Image: Erasmus MC - University Medical Center Rotterdam / Rotterdam, the Netherlands)

   

 

Scan method: thorax Dual Energy scan and Flash Spiral scan

Thorax Dual Energy scan:

Collimation: 64 x 0.6 mm80/140 Sn kV, 26/16 mAs
Spatial resolution: 0.30 mmDLP: 18 mGy cm
Scan time: 2 sCTDIvol: 1.28 mGy
Scan length: 118 mmEff. dose: 1.58 mSv
TI: 0.28 s 

 

Flash Spiral scan:

Collimation: 128 x 0.6 mm70 kV, 14 mAs
Spatial resolution: 0.30 mmDLP: 3 mGy cm
Scan time: 0.29 sCTDIvol: 0.15 mGy
Scan length: 118 mmEff. dose: 0.26 mSv
TI: 0.28 s 

 


Case 5: CT abdomen

SOMATOM Definition Edge

Diagnosis: EVAR with persistent aortic endoleak
(Image: Clinique CIMOP Bizet / Paris, France)

Collimation: 128 x 0.6 mm100 kV, 83 mAs
Spatial resolution: 0.30 mmDLP: 190 mGy cm
Scan time: 3 sCTDIvol: 3.29 mGy
Scan length: 543 mmEff. dose: 2.85 mSv
TI: 0.28 s 

 


Case 6: CT abdomen

SOMATOM Definition AS

Diagnosis: obese patient after cholecystectomy
(Image: C.I.M. Laennec / Cesson Sevigne, France)

Collimation: 64 x 0.6 mm100 kV, 300 mAs
Spatial resolution: 0.30 mmDLP: 529 mGy cm
Scan time: 10 sCTDIvol: 13.55 mGy
Scan length: 373 mmEff. dose: 7.9 mSv
TI: 0.5 s