TOWNE VIEW of the skull. X-ray special procedure of skull.

The Towne view is a radiographic projection used in X-ray imaging to visualize the skull, particularly the occipital bone and posterior cranial fossa.
Student can use this pptx to know all about the Towne view..

1. TOWNE VIEW PRESENTED BY- ABHISHEK KUMAR CHAUDHARY (BMRIT 5 th Sem ) CHHATRAPATI SHAHU JI MAHARAJ UNIVERSITY, KANPUR

2. INTRODUCTION A Towne’s View is an angled x-ray of the skull that allows doctors to see the inside of the skull, - Particularly the anterior exterior Portion. It is a special type of radiographic examination.
It is a painless and safe procedure that uses a small amount of radiation.
It is also called AP Axial Projection. Understanding the Towne view’s methodology, indications, and applications is crucial to enhance diagnostic accuracy.

3. INDICATION Identifying skull fractures that may have occurred after an accident or trauma.
Deformation of foramen magnum.
Neoplastic Processes (It is the abnormal growth of cell that in the formation of tumor or neoplasm).

4. CONTRAINDICATIONS Pregnancy : Pregnant patients should avoid unnecessary radiation exposure. If an X-ray is essential, appropriate precautions must be taken. Severe Head or Neck Injuries: Patients with recent or significant trauma to the head or neck may not be able to maintain the required positioning safely.

5. PATIENT PREPARATION Inform the patient about the procedure and his purpose. Obtain Consent Paper from the Patient before the procedure. Remove all metallic objects from patient’s head. (like-hair grips, ear clip’s and anything from the head and neck area).

6. PATIENT POSITIONING The patient is placed in erect or supine position.
Match midsagittal plane of head with perpendicular to the image receptor (IR)..
Bend Cervical Vertebrae (depress chin) forward enough to make orbitomeatal line (OML) Perpendicular to IR.
Ensure that no head rotation during examination.

7. CONTD…..

8. EVALUATION/ANATOMY DEMONSTRATION Dorsum sellae , and Posterior clinoids should show in the shadow of foramen magnum (indicate Correct CR angle and Proper neck flexion/Extension). Bilateral Petrous ridge should be symmetric, Indicating no rotation of head.” Orcipital bone.

9. TECHNICAL FACTORS SID =40 inches (102 cm) Cassette IR Size = 25x30cm (10x12inch) Grid:- use in this view’s. Exposure factor:- for analog system 75 to 80 kVp for digital system – 80 to 90 KVp

10. CONTINUED.. CENTRAL RAYS:- Generally project 30° craniocaudal (towards the feet) to orbitomeatal line (OML) 37° craniocaudal to IOML(infra orbitomeatal line). COLLIMATION:- Include the skull.

11. RADIATION PROTECTION/ SHIELDING Use proper shielding equipments to protect the patient from the unnecessary radiation exposure. Use thyroid shielding to protect the thyroid glands. Use lead apron to protect the patient body. We can also use the lead gloves to avoid unnecessary exposure to the patient hand.

12. ADVANTAGES OF TOWNE VIEW It provides a better view of the occipital bone and posterior fosa space than a non- angled AP view of skull. It is better than a conventional AP view for defining/ evaluating Lambdoid suture ( Lambdoid suture is a fibrous joint in the skull that connects the occipital bone Parietal bone).