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Tips for Achieva dual-coil imaging

Application Tip
Dalm, Sigrid Philips Healthcare

While Philips provides many dedicated coils for optimal imaging of specific anatomies, the region of interest may sometimes be larger than a single coil's coverage. In other cases, the patient may not fit into the coil due to size, injury or a plaster cast.

Combining coils to function as one large coil

In situations as outlined above, operators can exploit a new feature called Combined coil imaging, which is standard on Achieva from Release 2.1.3. In dual-coil imaging, two individual coils (specified in the table below) can be combined to function as a single coil with more elements.


Dual-coil imaging allows clinicians to increase anatomical coverage without repositioning the patient, thereby adding more local detail to routine examinations. Additionally, dual-coil imaging enables scanning of patients who will not fit into a regular coil and may facilitate occasional examinations for which a site has no dedicated coil available (e.g., pediatric patients). This method also permits the use of higher SENSE factors.

Coil combinations from Release 2.1.3 onwards:


Tips for optimal dual-coil imaging

To ensure safe use:

  • Use appropriate padding to ensure that cables and
    combiner boxes do not come into contact with the patient.
  • Take care to keep cables as straight as possible, avoid
    crossing cables.


To optimize image quality:

  • Position the coils to envelop the anatomy.
  • Maintain a minimum distance of 10 cm between the elements
    of a SENSE Flex coil.
  • Do not use coils in one line.
  • Always make a reference scan with a dual-coil setup.
  • The SENSE Flex-M coil must be identified in the
    Service Software.

Applications for dual-coil combinations

Applications for dual-coil imaging include knees, shoulders and hips, total neuro, and pediatric heart and abdomen. If you have developed and evaluated a dual-coil setup, please submit your clinical case or ExamCard for NetForum.  (Contributions are subject to review before publication on NetForum).



Knee imaging with SENSE Flex-M and SENSE Flex-S

Position one element of the SENSE Flex-S coil under the knee in the popliteal fossa and position the other element on the patella.


  • The SENSE Flex-M's two elements are positioned on medial and lateral sides of the knee.
  • The top three elements are strapped together before the patient is postioned on the table.
  • Use pads to create distance between the cables and the patient's skin.



Breast imaging with SENSE Flex-M and SENSE Flex-L

The breast images below are acquired by combining SENSE Flex-M and SENSE Flex-L. Courtesy of Erasme Hospital, Brussels, Belgium.
Dual-coil BLISS imaging.

Dual-coil imaging using a dual inversion sequence with fat suppression and water suppression.






ExamCard for dual-coil shoulder imaging:

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Sep 24, 2007

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Application Tip
Achieva 1.5T, Achieva 3.0T
Release 2
Body, Breast, Knee, Musculoskeletal, Shoulder

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