See and map lymphedema where it happens

LymphScanner measures localized tissue water in the skin and upper subcutaneous tissue using Tissue Dielectric Constant (TDC) technology.

The measurement is displayed as Percentage Water Content (PWC), providing an objective value for the specific anatomical site being assessed.

Because each measurement is localized, clinicians can compare different anatomical regions and follow tissue-water changes over time.

LymphScanner is designed for healthcare professionals working with lymphedema, including lymphedema therapists, physical and occupational therapists, oncology rehabilitation professionals, physicians and clinical researchers.

It can support lymphedema surveillance, clinical evaluation and treatment-response monitoring.

LymphScanner uses Tissue Dielectric Constant (TDC) technology.

A low-power electromagnetic field interacts with the tissue beneath the probe. Because the dielectric properties of tissue are strongly influenced by water, the reflected signal can be used to determine localized tissue water.

LymphScanner converts this measurement into Percentage Water Content (PWC), providing results within seconds.

The effective measurement depth is approximately 2.5 mm, focusing the assessment on the skin and upper subcutaneous tissue.

The methods answer different clinical questions.

Circumference and volume measurements ask:
Has the limb become larger?

LymphScanner asks:
Is tissue water different at this specific location?

Lymphedema-related tissue-water changes can be regional rather than evenly distributed throughout a limb. Localized measurement therefore allows clinicians to assess specific areas of interest that may not be represented by whole-limb measurements.

LymphScanner is intended to complement clinical examination and other appropriate assessment methods - not replace them.

Both methods provide objective information related to tissue fluid, but they assess it differently.

Bioimpedance spectroscopy (BIS) evaluates electrical impedance across a larger limb segment and is commonly used to assess limb-level fluid changes.

LymphScanner uses TDC to measure localized tissue water at individual anatomical sites.

This makes it possible to investigate regional differences - for example within the arm, breast or trunk - and repeatedly monitor specific areas of interest.

The methods therefore provide different and potentially complementary information.

Absolute tissue-water values vary between anatomical sites and individuals.

When an appropriate reference site is available, comparing anatomically corresponding locations provides a PWC ratio that expresses tissue-water asymmetry.

For example, a ratio of 1.20 means that the measured tissue-water value at one site is 20% higher than at its reference site.

Reference research involving 403 healthy women found that only 0.70% had an inter-arm TDC ratio greater than 1.20. This makes the ratio useful for understanding whether observed asymmetry is common or unusual relative to healthy reference data.

A ratio threshold is not a biological point at which lymphedema begins and should not be interpreted as a stand-alone diagnosis.

This is directly grounded in the new 403-woman reference paper we've added to the evidence base.

Yes. Breast cancer-related lymphatic dysfunction can involve the arm, hand, breast and trunk, and changes may be regional rather than uniformly distributed.

Localized tissue-water assessment allows clinicians to examine areas affected by surgery, lymph-node intervention or radiation and follow selected anatomical sites longitudinally.

Where an appropriate corresponding reference site exists, PWC ratios can add patient-specific information about tissue-water asymmetry.

Clinical interpretation should always consider treatment history, symptoms, examination and other relevant assessment findings.

Localized TDC measurement has been studied in the breast and trunk, areas where conventional limb-volume methods are difficult to apply.

This is an important advantage of localized tissue-water measurement: clinicians are not restricted to evaluating an entire extremity.

The available research includes studies specifically investigating breast edema and truncal lymphedema using TDC.

LymphScanner does not image lymphatic vessels or dermal backflow.

ICG lymphography or lymphofluoroscopy visualizes superficial lymphatic transport and dermal backflow patterns. LymphScanner measures localized tissue water.

Research comparing lymphofluoroscopy with clinical measurements has found associations between dermal backflow and increased local tissue-water measurements at several anatomical regions.

LymphScanner can therefore provide information about localized tissue-water abnormalities associated with altered lymphatic drainage, but it should not be described as directly detecting or imaging dermal backflow.

Yes. LymphScanner measures localized tissue water in the skin and upper subcutaneous tissue, where early lymphedema-related changes can occur.

Early lymphedema does not always present as uniform or visible swelling. Tissue-water accumulation can be localized to specific regions, and patients with early mild lymphedema may have few or no noticeable symptoms.  

By assessing multiple anatomical sites, LymphScanner can help clinicians spot localized tissue-water abnormalities, compare them with appropriate reference sites and monitor changes over time.

LymphScanner supports clinical assessment and surveillance; it is not intended to provide a stand-alone diagnosis of lymphedema.

Early lymphatic changes are not necessarily distributed evenly across an affected region.

Imaging studies using ICG lymphography have demonstrated regional dermal backflow patterns associated with lymphatic dysfunction. Research comparing lymphofluoroscopy with clinical assessment has also found that increased local tissue-water measurements are associated with dermal backflow in several anatomical regions.

LymphScanner does not image lymphatic vessels or dermal backflow directly. Instead, it measures the localized tissue-water changes that can occur in regions affected by altered lymphatic drainage.

By measuring multiple sites, clinicians can look for areas of elevated tissue water, compare them with corresponding reference sites and build a clearer picture of how tissue-water abnormalities are distributed.