ct protocols 2

Lower limbs and upper limbs

- Anatomic region : upper and lower limbs (wanted area )

- Positioning: supine, extended limbs, feet first.

Scout view: AP, length (250-600mm), angle 0 degree.

- Scan area: interested area.

Contrast media : If indicated by the radiologist

IV:100cc

Oral: No

Rectal:No

- Injection rate :2cc/sec

Scan delay time: 1 -2 minute

Scan type : axial or helical slice thickness ( 3-5mm).

Viewing ( photography): ST. ( 250-350ww), (35-50wl), BW(1800-2600ww), ( 300-500wl).

- Reconstruction : if indicated by the radiologist.

:

Sag:yes

Cor:yes

Axial:yes

3D display : yes

Special instruction : raw data must be saved

Remarks fixation

Carotids CTA

Anatomic region: Neck

Positioning Supine, neck slightly extended of shoulder down.

Scout view: AP and lateral, length ( 400-500mm ), angle 0 degree.

Scan area from base of skull to aortic arch.

Contrast media

IV:(100-150cc)

Oral: No

Rectal:NO

-Injection rate: 5.0 cc/sec

Scan delay time : 13-18 sec

Scan type : Helical, slice thickness (1.25mm)

- Viewing (photography ) : S.T ( 250-300 ww) ( 35-50wl)

- Reconstruction : yes

Sag:

Cor: yes

Axial:yes

3D display yes

Special instruction : raw data must be saved.

- Remarks:

1. call patient don't move.

2. move all metal thing from scan area.

3. Post processing 3D mip must be done.

Lower and Upper Extremities Joint

Anatomic region: Joint.

Positioning Supine, keep interested joint extended.

Scout view: AP and lateral, length (250-350mm), angle 0 degree.

Scan area: interested area.

Contrast media:

IV:

Oral:

Rectal:

Injection rate:

Scan delay time:

Scan type : axial or helical slice thickness ( 2-3mm)

Viewing ( photography) : ST. (250-350ww) (35-50wl), BW( 1500-2000ww) (300-500wl).

- Reconstruction : if indicated by the radiologist.:

Sag:yes

Cor:yes

Axial:yes

3D display yes

Special instruction : raw data must be save.

- Remarks:

1. call patient don't move.

2. move all metal thing from scan area.

3. Quit breathing and high expo sure is required.

Internal auditory meatus and mastoid

- Anatomic region : I.A.M ( temporal bone)-

Positioning :Supine (I.A.M line) parallel to x-ray beam, head first.

Scout view: AP and lateral length (100-200 mm ), angle 0 degree.

Scan area: I.A.M

Contrast media :if indicated by the radiologist.

IV: 50cc

Oral:

Rectal:

Injection rate:rapid injection

- Scan delay time : 30 sec.

Scan type : axial slice thickness (1-2 mm)

Viewing (photography) : S.T (250-300ww) ( 55-50wl), B.W (1500-2000 ww) ( 300-500wl)

- Reconstruction : as indicated by the radiologist

Sag:yes

Cor:yes

Axial:

3D display:

Special instruction : raw data must be saved

- Remarks:

1- call patient don't move.

2- remove all metal thing from scan area

Head

Anatomic region: posterior fossa

Positioning: supine 1.O.M parallel to x-ray beam head first.

Scout view: AP lateral, length(150-200mm), Angle 0 degree.

Scan area from foramen magnum to suprasellar cistern.

Contrast media:

IV :as indicated by the radiologist ( 50 cc)

Oral : No

Rectal :No

Injection rate: 1.0 cc/sec

Scan delay time : (1-2 min )

Scan type : axial slice thickness 2.5 mm.

Viewing (photography) : ST ( 75-150 ww ) ( 35-50wl) , B.W (1300-200 ww ) and ( 300-500wl).

Reconstruction : if indicated by the radiologist.

Sag:yes

Cor:yes

Axial:

3D display : yes

Special instruction : raw data must be saved.

Remarks:

1- call patient don't move.

2- move all metal thing from scan area.

Circle of willis

Anatomic region : Brain

Positioning : supine, head first, (LO.M) line parallel to x-ray beam

Scout view: AP and lateral , length (150-250 mm), angle 0 degree.

Scan area: from foramen magnum to vertex.

Contrast media :

IV :100-120cc

Oral : No

Rectal: No

Injection rate: 5 cc/ sec

Scan delay time: 15-18 sec

Scan type : helical, slice thickness 1.25mm

Viewing (photography ): (800-100ww(250-300wl)

- Reconstruction: yes

Sag: yes

Cor: yes

Axial: yes

3D display: yes

Special instruction: raw data must be saved.

Remarks:

1. call patient don't move.

2. move all metal thing from scan area.

3. post preprocessing 3D MIP must be done.

Facial bone and 3D

-Anatomic region: Facial bone

Positioning : supine, ( 1.O.M line) parallel to x-ray beam head first.

Scout view: AP and lateral, length (150-250 mm), angle 0 degree.

Scan area: from hand palate to top of frontal sinuses.

Contrast media :if indicated by the radiologist

IV: 50cc

Oral:No

Rectal: No

- Injection rate: 2.0 cc/sec

Scan delay time : 1 min

Scan type : helical slice thickness ( 1-3mm ).

Viewing photography B.W (1500-2500ww)/ (300-500wl)

- Reconstruction:

Sag: yes

Cor:yes

Axial:yes

3D display :yes

Special instruction : raw data must be saved.

Remarks 

1- call patient don't move.

2. remove all metal thing from scan area .

Cisternogram

Anatomic region: Brain

- Positioning: prone, (I.O.M line ) vertical to x-ray beam head first.

Scout view: Lateral, length ( 150-250mm ), angle 0 degree

Scan area: tip of nose to dorsum sella

Contrast media : water soluble intra thecal injection in spinal cord.

IV:

Oral:

Rectal:

Injection rate: manual injection

Scan delay time 30 minute.

Scan type helical slice thickness ( 1-2 mm)

Viewing photography B.W 800-100ww), (300-500wl), B.W (1500-1800ww), (300-500wl), S.T (250-350ww), (35-50wl).

Reconstruction : yes

Sag: yes

Cor: yes

Axial: yes

3D display

Special instruction : raw data must be saved.

Remarks:

1- call patient don't move.

2- move all metal thing from scan area.

3- proper centering to the head without any tilt.

4- keep the head in lower level than the body.