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XR-Assisted PET/CT Navigation for Cervical Lymph Node Dissection in Lung Cancer (XR-NeckLND)

14. maj 2026 opdateret af: National Taiwan University Hospital

Application of Extended Reality (XR)-Assisted PET/CT Fusion Navigation in Supraclavicular-to-Cervical Lymph Node Dissection for Lung Cancer

This single-arm, prospective feasibility study evaluates an Extended Reality (XR) headset-based preoperative surgical planning workflow that fuses 18F-FDG PET metabolic hotspots with CT anatomy on the OpVerse platform, in patients with non-small cell lung cancer (NSCLC) and supraclavicular or cervical lymph node metastasis (N3 disease) requiring lymph node dissection. Ten participants will undergo standard preoperative contrast-enhanced CT and whole-body PET. Synapse 3D software is used to segment key anatomic structures (clavicle, sternocleidomastoid, internal jugular vein, subclavian vessels, brachial plexus) and to project PET SUV hotspots onto the high-resolution CT model, yielding a patient-specific digital twin of functional tumor boundaries and at-risk neurovascular structures.

Immediately prior to skin incision, the operating surgeon dons an XR head-mounted display (HoloLens via OpVerse) and registers the digital twin to the patient's neck using stable bony landmarks (clavicular head, sternal notch, mastoid). The surgeon plans the optimal incision and initial dissection trajectory, avoiding superficial veins and projecting the location of deep PET-positive nodes. The XR device is then removed, and the planned cervical or supraclavicular lymph node dissection is performed using standard surgical technique without further intraoperative XR guidance.

The primary endpoint is a composite of safety and feasibility: absence of Grade ≥2 (Clavien-Dindo) phrenic nerve, brachial plexus, chyle leak, Horner syndrome, or major vascular injury through 30 days postoperatively, together with successful XR registration and incision planning. Secondary endpoints include incision planning accuracy, PET hotspot clearance rate, target registration error, operative time, estimated blood loss, and lymph node yield.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Background and Rationale NSCLC with supraclavicular or cervical lymph node metastasis (N3 disease) was historically considered unresectable. With the advance of multimodal therapy, complete lymph node dissection in selected patients has been shown to improve locoregional control. However, the supraclavicular fossa - frequently described as 'Pandora's Box' - is anatomically narrow and dense, with metastatic nodes often abutting the subclavian vessels, internal jugular vein, phrenic nerve, and brachial plexus. Conventional surgery relies heavily on the surgeon's tactile experience and 2D mental reconstruction of preoperative CT, increasing the risk of inadvertent neurovascular injury and incomplete clearance of post-treatment fibrotic versus active disease.

Intervention This study integrates two complementary technologies. (1) Multimodal image fusion using Fujifilm Synapse 3D maps PET SUV hotspots representing biologically active tumor onto a high-resolution CT anatomical model, producing a patient-specific digital twin. The fused model is exported to a static 3D format (OBJ/STL) and imported into the OpVerse XR platform - an offline data-conversion workflow with no real-time API coupling between the two systems, ensuring system stability and software compatibility. (2) Preoperative XR planning: in the operating room after general anesthesia and head/neck positioning, the surgeon wears an XR head-mounted display (HoloLens) and performs surface registration using stable bony landmarks. The 'see-through' overlay enables the surgeon to identify subcutaneous tumor hotspots and superficial venous anatomy, and to mark the optimal skin incision and initial dissection trajectory before any cut is made. The XR headset is then removed; lymph node dissection proceeds using standard sterile technique. Therefore the device functions purely as a preoperative visual aid (Non-Significant Risk), without entry into the sterile operative field.

Lymph node dissection definition En bloc systematic resection of the fibrofatty tissue containing metastatic nodes within the defined cervical or supraclavicular region, to achieve oncologic clearance and provide adequate tissue for pathologic staging and next-generation sequencing.

Statistical analysis All analyses are performed using SPSS. Continuous variables (operative time, blood loss, lymph node count) are summarized as mean ± SD or median; categorical variables (complications, registration success) as frequency and percentage. Successful completion rate of the XR-assisted workflow is reported with 95% confidence intervals. As a single-arm feasibility trial, no formal hypothesis testing is planned.

Preliminary data The investigators have completed a prior pilot trial (REC 202502149RINB, 2025) of XR-assisted lung nodule localization in 20 patients undergoing thoracoscopic sublobar resection, achieving 6-7 mm mean target registration error and 19/20 successful localizations without major complications. Because the supraclavicular region is more rigidly tethered to the bony skeleton and less affected by respiratory motion, registration accuracy in the present study is expected to be ≤5 mm.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

10

Fase

  • Ikke anvendelig

Kontakter og lokationer

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Studiekontakt

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Age 18 to 80 years.
  • Confirmed or highly suspected lung cancer with supraclavicular or cervical lymph node metastasis requiring lymph node dissection.
  • Willing to undergo preoperative PET/CT imaging.
  • Able to provide written informed consent.

Exclusion Criteria:

  • Prior high-dose radiation therapy to the neck causing severe distortion of cervical anatomy.
  • Inability to undergo imaging studies, or known allergy to iodinated contrast media.
  • Vulnerable populations as defined by local IRB regulations (e.g., pregnant women, prisoners, individuals lacking decisional capacity).

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Enhedens gennemførlighed
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: XR-Assisted Surgical Planning
Patients undergo XR-assisted preoperative incision planning using the OpVerse platform with HoloLens HMD, overlaying a PET/CT-fused 3D digital twin onto the patient's neck before skin incision. The XR device is then removed, and standard cervical/supraclavicular lymph node dissection is performed without intraoperative XR guidance.
An offline workflow in which patient-specific PET/CT-fused 3D models built in Synapse 3D are exported to OBJ/STL format and rendered via the OpVerse platform on a HoloLens head-mounted display. The surgeon performs surface registration to bony landmarks of the neck and shoulder for preoperative incision planning. The device is removed prior to skin incision and is not used during the sterile dissection.
En bloc systematic resection of fibrofatty tissue and metastatic lymph nodes within the cervical or supraclavicular region, performed using standard open surgical technique after XR-assisted incision planning.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Successful Completion of XR-Assisted Preoperative Surgical Planning Workflow
Tidsramme: Intraoperatively, prior to skin incision (Day 0)

Proportion of participants in whom the complete XR-assisted preoperative planning workflow is successfully executed, defined as meeting ALL of the following technical criteria:

  1. Successful import and rendering of the patient-specific PET/CT fused 3D digital twin (OBJ/STL format) on the OpVerse platform via the HoloLens head-mounted display.
  2. Successful surface registration to the patient's bony landmarks (clavicular head, sternal notch, mastoid) with a Target Registration Error (TRE) of 5 mm or less.
  3. Successful surgeon-performed marking of the optimal skin incision and initial dissection trajectory prior to skin incision. The endpoint is reported as the percentage of cases (out of 10) meeting all three criteria.
Intraoperatively, prior to skin incision (Day 0)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Incidence of Procedure-Related Adverse Events
Tidsramme: From surgery through 30 days postoperatively
Proportion of participants experiencing Grade ≥2 (Clavien-Dindo classification) adverse events related to the surgical procedure, including phrenic nerve injury, brachial plexus injury, chyle leak, Horner syndrome, or major vascular injury.
From surgery through 30 days postoperatively
Surgeon-Assessed Adequacy of XR-Planned Surgical Incision (3-Point Categorical Scale)
Tidsramme: Intraoperatively, at time of skin incision and during initial dissection (Day 0)

Adequacy of the XR-planned skin incision in exposing the targeted lymph nodes, assessed intraoperatively by the operating surgeon using a 3-point categorical scale:

  • Grade 1 (Adequate): the planned incision provides sufficient exposure of all targeted lymph nodes; no modification required.
  • Grade 2 (Minor modification): the planned incision requires extension of 2 cm or less to achieve adequate exposure.
  • Grade 3 (Major modification): the planned incision requires extension of more than 2 cm, or repositioning to a different skin site, to achieve adequate exposure.

The endpoint is reported as the proportion of cases (out of 10) in each grade.

Intraoperatively, at time of skin incision and during initial dissection (Day 0)
PET Hotspot Clearance Rate
Tidsramme: At time of surgery
Proportion of preoperatively identified PET-positive lymph nodes (SUV hotspots) that are completely resected, confirmed by review of the operative specimen against preoperative imaging.
At time of surgery
Target Registration Error (TRE)
Tidsramme: At time of surgery
Mean spatial offset (millimeters) between virtual model bony landmarks and corresponding patient anatomy after XR surface registration.
At time of surgery
Operative Time
Tidsramme: At time of surgery
Total time from skin incision to skin closure (minutes).
At time of surgery
Estimated Intraoperative Blood Loss
Tidsramme: At time of surgery
Volume of blood loss recorded during the procedure (milliliters).
At time of surgery

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Jin-Shing Chen, National Taiwan University Hospital

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. juni 2026

Primær færdiggørelse (Anslået)

1. april 2027

Studieafslutning (Anslået)

1. april 2027

Datoer for studieregistrering

Først indsendt

10. maj 2026

Først indsendt, der opfyldte QC-kriterier

14. maj 2026

Først opslået (Faktiske)

18. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

14. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 202602094DINA

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Individual participant data will not be shared outside the investigator team during this feasibility study. De-identified aggregate results will be reported in peer-reviewed publications.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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