Cancer Early Detection with Advanced Technology: DWIBS (Whole-Body Diffusion-Weighted Imaging)
Early detection of cancer is crucial, and advancements in diagnostic technology hold the key. One of the newest screening methods gaining attention is DWIBS (Diffusion-Weighted Whole-Body Imaging with Background Body Signal Suppression). At the membership-based VIP health screening clinic, 5Star Medical Club, DWIBS has been introduced. What advantages does this screening method offer compared to conventional health checkups? This article provides a detailed explanation of DWIBS, its features, and how it differs from traditional cancer screening methods.

What is DWIBS?
DWIBS (Diffusion-Weighted Whole-Body Imaging with Background Body Signal Suppression) is a type of full-body screening using MRI (Magnetic Resonance Imaging). This technology leverages the unique diffusion characteristics of cancer cells to detect cancer with high sensitivity. MRI employs a powerful magnetic field and radio waves to create detailed internal images, and it is considered highly safe as it does not involve radiation.
Features of DWIBS
1. High Sensitivity and Precision
DWIBS is based on the diffusion characteristics of cancer cells, which differ from those of normal cells. Specifically, cancer cells restrict water molecule movement compared to normal cells, resulting in distinctive signal patterns on MRI. This allows high-sensitivity detection of cancer cells, especially for small or early-stage cancers. Consequently, early detection becomes possible, improving treatment success rates.
2. Non-Invasive
DWIBS does not use radiation, so there is no risk of radiation exposure. Additionally, the procedure itself is non-invasive and causes minimal pain or discomfort. Traditional methods, such as needle biopsies or inserting cameras into the body, can be invasive and uncomfortable. DWIBS eliminates these drawbacks.
3. Full-Body Screening
The method allows for full-body scanning in a single session, enabling the detection of cancer in multiple areas. This is especially useful for identifying potential metastases or checking for multiple cancers. It provides a comprehensive health evaluation by examining the possibility of cancer spreading to other organs.

Differences from Traditional Cancer Screenings
Comparison with CT Scans and PET-CT
CT Scans: CT scans use X-rays to create internal images but come with a risk of radiation exposure. Additionally, it may be difficult to distinguish between cancerous and normal cells. CT scans excel in identifying bone abnormalities and large tumors but have limitations in detecting small cancers.
PET-CT: PET-CT involves injecting radioactive substances into the body to detect cancer, but it also poses a radiation exposure risk. Moreover, it is expensive and time-consuming. While PET-CT is effective for assessing cancer activity, full-body scans require significant time and cost.
DWIBS, compared to these methods, is non-invasive and poses no risk of radiation exposure. Additionally, it is relatively quick and provides faster results.
Comparison with Mammography and Ultrasound
Mammography: Mammography is particularly effective for early breast cancer detection but involves X-rays, posing a risk of radiation exposure. It may also be less effective for individuals with dense breast tissue. Mammography is specialized for breast cancer screening and cannot detect cancers in other parts of the body.
Ultrasound: While non-invasive and safe, ultrasound may miss cancers depending on their location or size. It is particularly limited in detecting cancers hidden behind bone or in fatty areas.
DWIBS outperforms these methods by offering full-body scanning in a single session, making it ideal for detecting cancers throughout the body. This enables a comprehensive evaluation of overall health rather than being restricted to specific areas.

Advantages of DWIBS
1. Improved Early Detection
The high sensitivity of DWIBS significantly enhances the likelihood of detecting cancer at an early stage. Early detection is a critical factor for improving treatment outcomes. Detecting cancer when it is small enables more effective treatments, such as surgery or radiation therapy, improving survival rates.
2. Peace of Mind
Because there is no radiation exposure, patients can safely undergo repeated screenings. This is especially beneficial for individuals at high risk, such as those with a family history of cancer or genetic predispositions, allowing regular checkups without significant burden.
3. Comfortable Procedure
Being non-invasive, the procedure causes no pain or discomfort. The examination is also relatively quick, placing minimal strain on patients. Typically, the procedure takes about 30 to 60 minutes, and patients can resume their daily activities immediately after.
4. Comprehensive Cancer Detection
The ability to scan the entire body in one session enables simultaneous detection of multiple cancers. This makes DWIBS especially useful for individuals at risk of cancers in various locations or those seeking a comprehensive health assessment. It provides a holistic evaluation of overall health.

Process of DWIBS Examination
The DWIBS examination takes approximately 30 minutes to 1 hour to complete. Below is an explanation of the procedure and the timeline for receiving results.
1. Before the Examination
Dietary and Activity Restrictions: There are no special restrictions on the day before or the day of the examination. However, some facilities may require dietary restrictions if oral contrast agents are used.
2. On the Day of the Examination
- Reception: Arrive at the reception desk by your appointment time.
- Filling Out a Questionnaire: Complete a questionnaire detailing your health status and medical history.
- Waiting Room: After completing the questionnaire, wait in the designated waiting area.
- Changing: Change into the provided examination gown in the changing room.
- DWIBS Examination: Undergo the MRI scan in the examination room. A dedicated coil will be placed over your body or in front of your face for imaging. The scan takes about 30 minutes to 1 hour and is painless.
- Changing Back: After the examination, return to the changing room and change back into your clothes.
3. Result Explanation
The examination results typically take about 2 to 3 weeks to be delivered by mail, depending on the facility.
Important Notes about DWIBS
DWIBS uses MRI equipment, so the same precautions as a standard MRI apply.
Who Might Not Be Eligible for DWIBS
The following individuals should confirm their eligibility with the medical facility beforehand:
- Pregnant individuals
- Those with pacemakers, artificial joints, cochlear implants, or intracranial aneurysm clips
- Individuals using magnetic dentures (these may become unusable)
- Individuals with tattoos or permanent makeup (risk of discoloration or heat reactions)
- Those with claustrophobia
- Individuals who may struggle to remain still during the procedure
Prohibited Items
The following items cannot be brought into the DWIBS examination room. Please remove all such items beforehand:
- Watches
- Piercings, necklaces
- Dentures
- Mobile phones
- Colored contact lenses
- Heat patches or plasters containing metal
For Those with Claustrophobia
For patients with claustrophobia, facilities may provide accommodations such as eye masks, low pillows, or playing music during the procedure to make the experience more comfortable. If you have claustrophobia, check with the facility beforehand to see what options are available.

Advantages of Undergoing DWIBS at 5Star Medical Club
At the membership-based VIP health screening clinic 5Star Medical Club, comprehensive full-body checkups are available. These include DWIBS performed using high-performance MRI equipment, MRA scans (MRI for brain vessels), and multi-slice CT scans. Choosing to undergo DWIBS here offers numerous advantages not found at other facilities.
Luxury Examination Environment
5Star Medical Club is located on the 4th floor of The Peninsula Tokyo in Hibiya, an area renowned for its five-star atmosphere. Patients can enjoy a luxurious environment while undergoing their health checkup. All examination rooms are on the same floor, eliminating long waiting times or the need to move between floors. This ensures smooth and comfortable examinations.

Comfortable and Precise Small-Group Environment
5Star Medical Club limits the number of daily appointments to six. This small-group approach allows for personalized and thorough services, enabling doctors to carefully analyze each patient’s data. In contrast, large hospitals often require one doctor to process data for hundreds of patients. At 5Star Medical Club, the limited number of patients ensures meticulous and accurate diagnostics.

Advanced Medical Technology and State-of-the-Art Equipment
DWIBS employs cutting-edge MRI technology capable of highly sensitive and precise cancer detection. At 5Star Medical Club, examinations are conducted using GE’s state-of-the-art equipment, allowing early cancer detection and expanded treatment options.

Comprehensive Health Management
In addition to health screenings, 5Star Medical Club offers health consultations and second opinions. Referrals to affiliated university hospitals are also available if necessary. This ensures that patients receive seamless medical care based on their screening results.

Collaboration with Affiliated Clinics
Facilities such as 5Star Medical Club, located on the same floor as 5Star Medical Club, offer follow-up care and preventative medical services. Based on results from 5Star Medical Club, patients can undergo treatments such as microwave hyperthermia therapy, NK cell therapy, and rejuvenation maintenance services.
[Microwave Hyperthermia Therapy]
It has long been known that cancer cells are more susceptible to heat than normal cells. Microwave cancer therapy has been developed as a cutting-edge treatment, delivering high temperatures safely and efficiently. Without invasive procedures, microwaves emitted from a device 20 cm away from the body intersect at tumor sites for effective heating. This offers radiation-level efficacy with minimal side effects, as healthy tissue experiences little temperature increase.
[NK Cell Therapy]
NK (Natural Killer) cell therapy is an immune treatment designed to detect and eliminate aging cells and precancerous cells. NK cells, extracted from the patient’s blood, are cultured and reintroduced into the body after being significantly enhanced. This therapy is gentle on the body and effective in preventing cancer recurrence or metastasis. It also enhances blood circulation, stimulates skin cell activity, and improves skin renewal and metabolism, leading to anti-aging benefits.

Privacy-Focused, Reservation-Only Service
5Star Medical Club operates strictly by reservation to ensure patient privacy. The relaxed atmosphere reduces mental stress, allowing patients to undergo their examinations comfortably.
Highly Skilled Medical Staff
At 5Star Medical Club, highly trained physicians and medical technicians offer continuous support, from examinations to diagnosis and treatment. Patients can undergo screenings with peace of mind thanks to the expertise of the staff.
Conclusion
DWIBS (Diffusion-Weighted Whole-Body Imaging) represents a groundbreaking option for cancer screening. Its high sensitivity, non-invasive nature, and capability for full-body scans provide distinct advantages over traditional methods. Without the risk of radiation exposure, this technique enables early detection and is expected to save many lives as it becomes more widespread. By addressing the limitations of traditional PET-CT scans while reducing patient burden, DWIBS is gaining adoption worldwide. Take the first step in safeguarding your health by utilizing the latest cancer screening technologies.