Retrospective observational study on patient setup in carbon-ion radiotherapy for breast cancer

Study on setup for carbon-ion radiotherapy in breast cancer - Retrospective observational study on patient setup in carbon-ion radiotherapy for breast cancer

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000062019

Enrollment

Registered

2026-06-23

Start date

2026-06-23

Completion date

Unknown

Last updated

2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast cancer

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Breast cancer patients who underwent carbon-ion radiotherapy with metallic marker implantation between June 2017 and February 2024.

Exclusion criteria

Exclusion criteria: Patients for whom setup time or marker positional data were not recorded Patients who declined the use of their information for this study

Design outcomes

Primary

Measure	Time frame
Comparison of total setup time between the supine and prone positions.	—

Secondary

Measure	Time frame
Marker positional deviations and trends in the supine and prone positions, and subdivided time for each step (immobilization device setup, X-ray imaging, and repositioning).	—

Countries

Japan

Contacts

Public ContactMasaru Wakatsuki

National Institutes for Quantum Science and Technology (QST) QST Hospital

wakatsuki.masaru@qst.go.jp043-206-3360

Outcome results