Online adaptive MR-guided stereotactic radiotherapy for unresectable malignancies in the upper abdomen using a 1.5T MR-linac

Figures & data

Table 1. Patient and tumor characteristics of 25 patients with upper abdominal malignancies treated with MR-guided SBRT on a 1.5 T MR-linac.

Sex, n male (%)	12 (48)
Age in years, median (IQR)	66 (55–73)
Tumor site, n (%)
Pancreas	16 (64)
Periampullary	7 (28)
Adrenal gland	1 (4)
Upper abdomen	1 (4)
Type of tumor, n (%)
Primary	5 (20)
Recurrent	16 (64)
Metastasis	3 (12)
Unclear	1 (4)
Tumor size in mm, median (range)	29 (8–79)
Clinical symptoms^a
Abdominal pain	11 (44)
Back pain	2 (8)
Pain score, median (range)	4 (1–9)
Fatigue	3 (12)
Weight loss	3 (12)
Prior treatment, n (%)
Chemotherapy	3 (12)
Chemotherapy + local ablative therapy	2 (8)

Abbreviations. MR, magnetic resonance; SBRT, stereotactic body radiation therapy; T, tesla; linac, linear accelerator; mm, millimeter; IQR, interquartile range.

^aPatients could experience more than one symptom.

Figure 1. Online workflow on the 1.5T MR-linac.

PV, position verification; calc, calculations.

Data availability statement

The data that support the findings of this study are available from the corresponding author, LD, upon reasonable request.