Part 18: Problem of Matching Fields

term. abutting fields

fields with matching borders

What is the problem with abutting fields?

hot spots

Fields that commonly have abutments and others:

Commonly:

1. Mantle | Inverted Y

2. Para aortics: hockey stick (dog leg)

Additional:

1. Smoke Stack field

2. Matching Spine

3. Orthogonal Fields

Label

1. Mantel Field

2. Inverted Y

3. TNI: Total Nodal Irradiation

TNI stand for

Total Nodal Irradiation

The following fields are associated with:

1. Mantle | Inverted Y

2. Para aortics: hockey stick (dog leg)

1. HD

2. Testicular tx

1. What field is #2

2. What is it used for

1. Smoke Stack field: 4 field pelvis with periaortic field

2. Cervical or Postate with periaortic involvement

Abutment problems often revolve around concerns for?

Potential Spinal Cord Damage

Term. Orthogonal Fields

def. Fields that are perpendicular to each other, and

have a single common border

Examples of orthogonal fields

1. Craniospinal axis fields

2. H&N tumors w/ abutting superclav

3. Breast w/ abutting superclav

1. What field is this?

2. Other names.

3. What does it treat?

4. What cancer is this field used for?

1. Craniospinal axis field

2. German helmet, Total Spinal Irradiation (TSI)

3. Treats (nearly) the whole brain and the whole spine PA

4. Medulloblastoma

For an orthogonal breast tx, the supraclav field is also know as the ___ field

yoke