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RecruitingNCT07663474Updated Jun 25, 2026

Mobile Restriction on Dopamine Transporter

An interventional study of Mobile phone restrction in Addiction and SMARTPHONE OWNER, sponsored by Pusan National University Hospital. Recruiting at 1 site in South Korea. Open to participants aged 19 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-06-25.

Sponsored by Pusan National University Hospital · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Started May 2026; still recruiting 6 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Not applicable
Ages
19 Years to 40 Years
Sex
All
01

Study summary

Restriction of mobile phone use for 2wks and undergo PET scanning for DAT bindinng. Free use of mobile phone use for 2wks and undergo PET scanning for DAT bindinng.

02

Conditions studied

  • Addiction
  • SMARTPHONE OWNER

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03

In context

Behavior, Addictive

521 studies on the registry are indexed under Behavior, Addictive; 124 are open to participants now.

This study's planned enrollment of 30 is below the median of 62 across 399 interventional studies indexed under Behavior, Addictive.

Browse Behavior, Addictive studies →

Lead sponsor

Pusan National University Hospital is the lead sponsor of 80 studies on the registry; 8 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
19 Years to 40 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Healthy subjects with daily use of mobile phone (IPhone)
  • Accessible with "Screentime" application

Exclusion criteria

Exclusion Criteria:

  • Neuropsychiatric disease
  • Subjects who have medications for mental illness
  • Subjects who cannot undergo PET scans
  • Subjects who cannot participate 4 weeks of this study
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
30 participants (estimated)

Study arms

  • Experimental
    free use for 2weeks + Mobile restriction for 2weeks

    Device: Mobile phone restrction

Interventions

  • DeviceMobile phone restrction

    Mobile phone restrction for 2 weeks

06

What researchers measure

Primary outcomes

  1. Dopamine transporter

    PET

    Time frame: 2weeks after intervention

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 25, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07663474
Lead sponsor
Pusan National University Hospital
Responsible party
Kyoungjune Pak (Associate professor, Pusan National University Hospital) — Principal investigator
First posted
Jun 23, 2026
Start date
May 1, 2026
Primary completion
Dec 31, 2029 (estimated)
Completion
Dec 31, 2030 (estimated)
Last update
Jun 25, 2026

Study contacts

Kyoungjune Pak, MD, PhD
Contact
ilikechopin@pusan.ac.kr
+82-51-240-7389

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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