CT-Thorax (lavdosis) + Aorta Thoracalis

Indikation

Aorta aneurisme, dissektion og ruptur.

Anatomisk region

Fra apex til diaphragma.

Forberedelse

eGFR max 7 dage gammel.

Patienter må gerne indtage et let måltid inden undersøgelsen

PO-kontrast

Ingen

IV-kontrast

OBS:
Ved patienter over 100 kg gives 100 ml kontrast med 5 ml/s!

Lejring

Rygleje med armene over hovedet

Centrering

Over apex / 0 stil under diaphragma

Bemærkninger

Lavdosis

Aorta

Topogram

120

Længde

512

Rørposition

Siemens: Bottom / Philips: Frontal

Retning

Siemens: Craniocaudal / Philips: Out

Autotask

Siemens: Auto / Philips: Local, Pacs

1. Akvisition

Bemærkninger/

Lokale forhold

			SIEMENS Definition Flash			PHILIPS Ingenuity
Care Dose 4D			On	DoseRight		On
Care kV			Semi	Z-modulation		On
Quality ref. mAs			40	3D-modulation		On
Ref. kV			120	DoseRightIndex		14
kV			Off	kV		120
Eff. mAs			Off	mAs		64
Dose saving optimezed for			3	Cerebrum/lever Boost, DRI		Off
Kollimering			128 x 0.6 mm	Kollimering		64 x 0,625
Slice			O,6 mm	Slice		0,62
Rotationstid			0.5	Rotationstid		0,4 s
Pitch			1,0	Pitch		1,0
Rekonstruktioner
1. Rekonstruktion
	SIEMENS Definition Flash				PHILIPS Ingenuity
Snittykkelse	2 mm				2 mm
Inkrement	2 mm				2 mm
Recon Region Auto Location	Thorax - Lung				Chest
SAFIRE/ iDose	3				3
Algoritme Kernel/filter	I30 medium smooth				Standard (B)
Autotasking	Pacs				Local, Pacs
W / L	Emboli 420 / 60				360 / 60
2. Rekonstruktion Lunge
	SIEMENS Definition Flash				PHILIPS Ingenuity
Snittykkelse	1 mm				1 mm
Inkrement	0,8 mm				0,8 mm
Recon Region Auto Location	Thorax - Lung				Chest
SAFIRE/ iDose	3				3
Algoritme Kernel/filter	I50f medium sharp				Y-Detail (YB)
Autotasking	Pacs				Local, Pacs
W / L	1500 / -500				1600 / - 600
3. Rekonstruktion Coronal/Sagittal
	SIEMENS Definition Flash				PHILIPS Ingenuity
Snittykkelse	2 mm				2 mm
Inkrement	2 mm				2 mm
Recon Region Auto Location	Thorax - Lung				Chest
SAFIRE/ iDose	3				3
Algoritme Kernel/filter	I30f medium smooth				Standard (B)
Autotasking	Pacs				Local, Pacs
W / L	Emboli 420 / 60				360 / 60
Bolus Tracking
Locator		Under Carina
Tracker		Aorta
Monitorerings-delay		Siemens 10 s / Philips 12 s
Treshhold		120 HU
Diagnostisk Delay		Siemens:8 s / Philips 10 s
Locator

1. Akvisition

Bemærkninger/ Lokale forhold

		SIEMENS Definition Flash			PHILIPS Ingenuity
Care Dose 4D		On	DoseRight		On
Care kV		On	Z-modulation		On
Quality ref. mAs		100	3D-modulation		On
Ref. kV		100	DoseRightIndex		15
kV		Off	kV		100
Eff. mAs		Off	mAs		120
Dose saving optimized for		11	Cerebrum/ lever boost		Ingen
Kollimering		128 x 0,6	Kollimering		64 x 0,625
Slice		0,6 mm	Slice		0,625
Rotationstid		0,5 s	Rotationstid		0,4
Pitch		1,2	Pitch		1,2
Rekonstruktioner 1. Rekonstruktion
	SIEMENS Definition Flash			PHILIPS Ingenuity
Snittykkelse	2 mm			2 mm
Inkrement	2 mm			2 mm
Recon Region Auto Location	Thorax - Chest			Chest
SAFIRE/ iDose	3			3
Algoritme Kernel/filter	I31f medium smooth			Standard (B)
Autotasking	Pacs			Local, Pacs
W / L	Aorta 1000 / 200			1000 / 200
2. Rekonstruktion til 3D
	SIEMENS Definition Flash			PHILIPS Ingenuity
Snittykkelse	0,75 mm			0,8 mm
Inkrement	0,7 mm			0,8 mm
Recon Region Auto Location	Thorax - Chest			Chest
SAFIRE/ iDose	3			3
Algoritme Kernel/filter	I26f medium smooth			Smooth (A)
Autotasking	Pacs			Local, Pacs
W / L	Aorta 1000 / 200			1000 / 200
3. Rekonstruktion Coronal/Sagittal
	SIEMENS Definition Flash			PHILIPS Ingenuity
Snittykkelse	2 mm			2 mm
Inkrement	2 mm			2 mm
Recon Region Auto Location	Thorax			Chest
SAFIRE/ iDose	3			3
Algoritme Kernel/filter	I30f medium smooth			Standard (B)
Autotasking	Pacs			Local, Pacs
W / L	Aorta 1000 / 200			1000 / 200
3. Rekonstruktion Coronal/Sagittal
	SIEMENS Definition Flash			PHILIPS Ingenuity
Snittykkelse	2 mm			2 mm
Inkrement	2 mm			2 mm
Recon Region Auto Location	Thorax			Chest
SAFIRE/ iDose	3			3
Algoritme Kernel/filter	I30f medium smooth			Standard (B)
Autotasking	Pacs			Local, Pacs
W / L	Aorta 1000 / 200			1000 / 200

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