# DICOM Standard Browser

Built with by Innolitics, a team of medical imaging software developers.

Data synced with official DICOM standard on 18 April 2024. The DICOM Standard is under continuous maintenance, and the current official version is available at http://www.dicomstandard.org/current/. DICOM Parts 3, 4, and 6, © NEMA. Please note that the most recent PDF version of the standard is the official reference, and should checked when making technical decisions.

## Fraction Pattern Attribute

Tag (300A,007B) Optional (3) FractionPattern 1 Long Text (LT)

String of 0's (no treatment) and 1's (treatment) describing the fraction pattern for the fractions defined by this set. Length of string is 7 x Number of Fraction Pattern Digits Per Day x Repeat Fraction Cycle Length. The first character of the string represents Monday.

See Section C.36.2.1.1.1.1.

## Section C.36.2.1.1.1.1

###### C.36.2.1.1.1.1 Fraction Pattern

The Radiation Fraction Pattern describes the intended scheme, i.e., how fractions are to be distributed along calendar days for the actual radiation set.

Examples of Fraction Patterns:

1. 1 fraction per day (Monday to Friday), no fractions on Saturday and Sunday, 1 week-pattern:

Number of Fraction Pattern Digits Per Day (300A,0079) = 1

Repeat Fraction Cycle Length (300A,007A) = 1

Fraction Pattern (300A,007B) = 1111100

2. 2 fractions per day (Monday to Friday), no fractions on Saturday and Sunday 1 week-pattern:

Number of Fraction Pattern Digits Per Day (300A,0079) = 2

Repeat Fraction Cycle Length (300A,007A) = 1

Fraction Pattern (300A,007B) = 11111111110000

3. 1 fraction per day (Monday, Wednesday, Friday), no fractions on Saturday and Sunday 1 week-pattern:

Number of Fraction Pattern Digits Per Day (300A,0079) = 1

Repeat Fraction Cycle Length (300A,007A) = 1

Fraction Pattern (300A,007B) = 1010100

4. 2 fractions per day (Monday, Wednesday, Friday), one fraction on Saturday morning and Sunday afternoon 1 week-pattern:

Number of Fraction Pattern Digits Per Day (300A,0079) = 2

Repeat Fraction Cycle Length (300A,007A) = 1

Fraction Pattern (300A,007B) = 11001100111001

5. 1 fraction per day every other day 2 week-pattern:

Number of Fraction Pattern Digits Per Day (300A,0079) = 1

Repeat Fraction Cycle Length (300A,007A) = 2

Fraction Pattern (300A,007B) = 10101010101010