1. IN COMPUTED TOMOGRAPHY
Soft Tissue Neck
IN COMPUTED TOMOGRAPHY
Frank Cairo R.T. ( R ) ( CT ) ( MR )

2. Learning Objectives
To describe clinical indications for C.T. examinations of the neck soft tissue. To understand and recognize anatomy and landmarks. To show the proper scan protocols and procedures.

3. TOPICS Gross anatomy Neck anatomy facts Patient prep Indications
Scan protocols
Soft tissue neck slides

4. Gross Anatomy

5. Hyoid Bone
A horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage
Level with the third cervical vertebra (C3) behind
The hyoid is only distantly articulated to other bones by muscles or ligaments

6. Hyoid Bone

7. Hyoid Bone

8. Thyroid Cartliage Know as the Adams apple
Largest and most superior in the neck
Level with C3-4
protect the vocal cords
Does not make a ring around trachea

9. Thyroid Cartliage

10. Cricoid Cartliage At the level of C6 Makes a ring around trachea
Applies attachments for muscles and ligaments

11. Cricoid Cartliage

12. Thyroid Gland Largest gland in the neck
Has 2 lobes connected by the isthmus
Sometimes had pyramidal lobe
 Controls how quickly the body uses energy, makes proteins, and controls how sensitive the body is to other hormones
Produces thyroid hormones

13. Thyroid Gland

14. Carotid Anatomy

15. Carotid Artery

16. Veins of the neck

17. Veins of the neck

18. Neck Circulation 1- rt common carotid artery
2- rt internal jugular vein
3- rt.subclavian artery
4- brachiocephalic artery
5- rt and lt brachiocephalic vein
6- SVC
7- lt common carotid artery
8- lt internal jugular vein
9- lt.subclavian artery
10 – arotic arch

19. Lymph Nodes

20. Lymph Nodes

21. Salivary Glands
 exocrine glands, glands with ducts, that produce saliva
Saliva for chemical digestion
3 main glands and several minor
Parotid, Submandibular, and Sublingual

22. Salivary Glands

23. Salivary Glands

24. Airway

25. General Imaging Methods—Neck
Performed supine with neck slightly extended
Most often done in helical mode
IV contrast is used, unless contraindicated
Split-bolus injection technique is used by some institutions
The goal is to allow sufficient time after contrast administration for mucosa, lymph nodes, and pathologic tissue to enhance, yet acquire images while the vasculature remains opacified

26. Neck Anatomy Facts Neck broken into 3 compartments Visceral Vascular
Contains organs
Vascular
Contains arteries and veins
Muscular
Neck muscles
Landmarks
Larynx c3-c6
Cricoid cartilage c5-c6
Carina T4-T5
Carotid bifurcation c3-c4
Thyroid cartilage c3-c4

27. Indications Diagnosis of neoplasms Infections and abscesses
Thyroid mass
Salivary gland disorders
Vocal cord disorders

28. Patient Preparation
If exam is done with I.V. contrast patient must be NPO 4-6 hours
Lab work for I.V. contrast exams
Follow all routine precautions for contrast

29. SINUSES COLLIMATION 0.75mm SLICE THICKNESS 3-5MM FOV 14-20 CM PITCH
1.0
WINDOW
450/30 NECK /300 BONE
16X0.75
FEED/ROTATION
12 MM
INJECTION
ml/sec delay sec

30. Soft Tissue Neck 1- SVC 2- Brachiocephalic Artery
3- Lt. Common Carotid
4- Lt. Subclavian Artery 2 1 3 4

31. Soft Tissue Neck 1- Thyroid Gland 2- Common Carotid3
1- Thyroid Gland
2- Common Carotid
3- Internal Jugular
4- Verterbral
5- Rt Subclavian 5 4

32. Bifurcation
Above
Below cc Ec cc Ic

33. Neck 1- Internal Juglar vein 2- Submandibular Gland3 4 5
1- Internal Juglar vein
2- Submandibular Gland
3- Carotid Biufcuation
4- Hyoid Bone
5- epiglottis
6- Vertebral Artery 2 6 1

34. Neck
1- Vertevbral Artery

35. Salivary Gland
1- Parotid Gland 1

36. Salivary Gland
1- Submandibular Gland 1

37. Neck
1- Basilar Artery
2- Internal Carotid

38. Soft tissue neck