Effects of different breathing methods on dose distribution in carbon ion radiotherapy for head and neck cancer

Effects of different breathing methods on dose distribution in carbon ion radiotherapy for head and neck cancer - Effects of different breathing methods on dose distribution in carbon ion radiotherapy for head and neck cancer

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000037119

Enrollment

Registered

2019-06-30

Start date

2019-07-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

head and neck cancer

Interventions

Mouth breathe Nose breathe

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Histologically confirmed head and neck cancer Patients who undergo carbon ion radiotherapy in QST hospital patients who are expected to include the soft palate and tongue in the radiation field. patients who cannnot use the tongue depressor

Exclusion criteria

Exclusion criteria: Other medical or psychological unsuitable reasons There are significant metal artifacts on the treatment planning CT images. Patients with nasal cavity or oral cavity who have difficulty breathing with either nasal or mouth breathing.

Design outcomes

Primary

Measure	Time frame
Dose to tongue and soft palate, dose to risk organs such as pharyngeal mucosa and spinal cord, dose to gross tumor volume and planned target volume in DVH analysis	—

Countries

Japan

Contacts

Public ContactHiroaki Ikawa

National Institutes for Quantum and Radiological Science and Technology QST Hospital

ikawa.hiroaki@qst.go.jp043-206-3306

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026