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. 2025 Sep 2;35:100336. doi: 10.1016/j.tipsro.2025.100336

Table 1.

Departmental OAR tolerances used in the reirradiation workflow. All tolerance doses are defined in EQD2. Structures that end in + 1 mm require a planning risk volume of 1 mm to be added. ‘Open’ refers to an open-ended constraint, and ‘no constraint’ refers to OARs that have no defined constraints, both of which should be discussed on a case-by-case basis. Values are based on in-house expert consensus of which are currently under evaluation in a prospective cohort to determine the safety of these dose limits.

Structure
Alpha/Beta
Parameter
Eq2Gy
Total Dose [Gy]
Objective Variation
Thorax
Lungs 3 Dmean [Gy] ≤ 22.00 ≤ 26.00
Lungs 3 D1500cc ≤ 22.00 ≤ 26.00
Lung 3 V20 [Gy] ≤ 40 %
Brachial Plexus 3 D 3.0 cc [Gy] ≤ 75.00 ≤ 90.00
Brachial Plexus 3 D0.03 cc [Gy] ≤ 90.00 ≤ 110.00
Bronchial Tree 3 D0.1 cc [Gy] ≤ 120.00 ≤ 140.00
Bronchial Tree 3 D0.03 cc [Gy] ≤ 130.00 ≤ 150.00
Bronchial Tree 3 D5cc [Gy] ≤ 90.00 ≤ 95.00
Thoracic Wall 3 D30cc [Gy] ≤ 80.00 ≤ 100.00
Thoracic Wall 3 D5cc [Gy] ≤ 120.00 ≤ 140.00
Esophagus 3 D0.03 cc [Gy] ≤ 100.00 ≤ 120.00
Esophagus 3 D0.1 cc [Gy] ≤ 90.00 ≤ 110.00
Esophagus 3 D1.00 cc [Gy] ≤ 80.00 ≤ 90.00
Esophagus 3 D5.00 cc [Gy] ≤ 70.00 ≤ 90.00
Heart 3 D15cc [Gy] ≤ 60.00 ≤ 80.00
Heart 3 D0.1 cc [Gy] ≤ 85.00 ≤ 130.00
Spinal Canal 2 D0.1 cc [Gy]
Great Vessels 3 D0.03 cc [Gy] ≤ 120.00 open
Abdomen
Kidney 3 D200cc [Gy] ≤ 15.00 ≤ 20.00
Kidney 3 D75% ≤ 12.00 ≤ 15.00
Stomach 3 D0.1 cc [Gy] ≤ 60.00 ≤ 80.00
Stomach 3 D1cc [Gy] ≤ 54.00 ≤ 70.00
Duodenum 3 D0.1 cc [Gy] ≤ 60.00 ≤ 80.00
Duodenum 3 D1cc [Gy] ≤ 54.00 ≤ 70.00
Bowel 3 D0.1 cc [Gy] ≤ 60.00 ≤ 80.00
Bowel 3 D0.5 cc [Gy] ≤ 54.00 ≤ 70.00
Liver-GTV 3 D700cc [Gy] ≤ 18.00 ≤ 25.00
Liver-GTV 3 Dmean [Gy] ≤ 25.00 ≤ 30.00
Spinal Nerve 2 D0.1 cc [Gy] ≤ 70.00 ≤ 90.00
Cauda Equina 3 D0.1 cc [Gy] ≤ 67.00 ≤ 85.00
Sacral Plexus 2 D0.1 cc [Gy] ≤ 67.00 ≤ 85.00
Pelvis
Bladder 3 D0.5 cc [Gy] ≤ 105.00 ≤ 120.00
Bladder 3 D2cc [Gy] ≤ 95.00 ≤ 105.00
Rectum 3 D0.5 cc [Gy] ≤ 105.00 ≤ 110.00
Rectum 3 D2cc [Gy] ≤ 95.00 ≤ 105.00
Spinal Nerve 2 D0.03 cc [Gy] ≤ 90.00 ≤ 110.00
Spinal Nerve 2 D1cc [Gy] ≤ 75.00 ≤ 90.00
Ureter 3 no constraint
Urethra 3 no constraint
Femoral Head 3 no constraint
Penile Bulb 3 no constraint
Head and Neck
Brainstem 2 D0.1 cc [Gy] ≤ 68.00 ≤ 80.00
Chiasm 2 D0.03 cc [Gy] ≤ 68.00 ≤ 80.00
Cochlea ipsilateral 3 Dmean [Gy] ≤ 45.00 ≤ 60.00
Cochlea contralateral 3 Dmean [Gy] ≤ 45.00 ≤ 60.00
Optic Nerve 2 D0.03 cc [Gy] ≤ 68.00 ≤ 80.00
Trachea 3 D0.03 cc [Gy] ≤ 120.00 ≤ 140.00
Trachea 3 D0.1 cc [Gy] ≤ 110.00 ≤ 120.00
Brain 3 D0.1 cc [Gy] ≤ 110.00 ≤ 120.00
Carotid Artery + 1 mm 3 D0.03 cc [Gy] ≤ 100.00 ≤ 135.00
Mandible 3 Dmean [Gy] ≤ 40.00 ≤ 60.00
Mandible 3 D0.1 cc [Gy] ≤ 70.00 ≤ 130.00
Brain
Brainstem 2 D0.1 cc [Gy] ≤ 80.00 ≤ 100.00
Chiasm 2 D0.03 cc [Gy] ≤ 68.00 ≤ 80.00
Optic Nerve 2 D0.03 cc [Gy] ≤ 68.00 ≤ 80.00
Retina 3 D0.03 cc [Gy] ≤ 70.00 ≤ 80.00
Lens 3 no constraint
Brain − GTV 3 D0.1 cc [Gy] ≤ 100.00 ≤ 120.00