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Advances in Radiotherapy
& Nuclear Medicine Barcode system for immobilization device

A B C

D E F

Figure 2. Example of a barcode on various immobilization systems. (A) Lower body immobilization; (B) Upper body immobilization; (C) Head and neck
immobilization; (D) Cone for electron; (E) Square and circle-shaped mold; (F) Bolus.

A B C

D E F

Figure 3. Barcode to identify opening or closing of the couch rail. (A) Couch rail opens; (B) Couch rail closes; (C) Dose distribution showing that couch
rail should be closed to avoid beam interference; (D) The barcode is hidden when the rail is opened; (E) The barcode can be scanned when the rail is closed;
(F) Placement of barcode reader.

Table 1. Immobilization devices used at our institution
Part of immobilization Types of immobilization device
Head fixation six different pillows Individual shell
Upper body Posi-rest Wing board Arm support
Lower body Knee-fix Feet rest
Individual immobilization Hip-fix Vac-Lok
Bolus 5 mm 10 mm
Couch Mylar board Flat panel
Couch rail Close/open Right/left
Cone size and mold size 6, 10, 15, 20, and 25 cm Various circles Various rectangles
6, 10, 15, 20, and 25 cm 2

is closed (Figure 3E). A cone is used in electron irradiation. When the correct barcode is scanned, high-pitched
There are five types of cones and various mold shapes are sound would be generated from RIS system, as well as the
made using low melting point lead. The cone and mold are background color of the line on RIS monitor would change
labeled by barcodes. from yellow to white where the relevant setup item is

Volume 1 Issue 1 (2023) 3 https://doi.org/10.36922/arnm.1036