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Advantages of multidetector-row CT with multiplanar reformation in guiding percutaneous lung biopsies

Vantaggi dell’utilizzo dell’MPR con TCMD nella guida delle biopsie polmonari percutanee

  • Chest radiology/Radiologia toracica
  • Published:
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Abstract

Purpose

This study aimed to assess the usefulness of multiplanar reformations (MPR) during multidetector-row computed tomography (MDCT)-guided percutaneous needle biopsy of lung lesions difficult to access with the guidance of the native axial images alone owing to overlying bony structures, large vessels or pleural fissures.

Materials and methods

MDCT-guided transthoracic needle biopsy (TNB) was performed on 84 patients (55 men and 29 women; mean age 65 years) with suspected lung neoplasm by using a spiral MDCT scanner with the simultaneous acquisition of six slices per rotation. We determined the site of entry of the 22-gauge Chiba needle on native axial images and coronal or sagittal MPR images. We took care to ensure the shortest needle path without overlying large vessels, main bronchi, pleural fissures or bony structures; access to the lung parenchyma as perpendicular as possible to the pleural plane; and sampling of highly attenuating areas of noncalcified tissue within the lesion.

Results

Diagnostic samples were obtained in 96% of cases. In 73 patients, lesions appeared as a solid noncalcified nodule <;2 cm; 11 lesions were mass-like. In 22, the biopsy required MPR guidance owing to overlying ribs (18), fissures (2) or hilar-mediastinal location (2).

Conclusions

MDCT MPR images allowed sampling of pulmonary lesions until now considered unreachable with axial MDCT guidance because of overlying bony structures (ribs, sternum and scapulae) or critical location (hilar-mediastinal, proximity to the heart or large vessels). Compared with the conventional procedure, the use of MPR images does not increase the rate of pneumothorax or the procedure time.

Riassunto

Obiettivo

Valutare l’utilità delle immagini multiplanar reformations (MPR), durante agobiopsia percutanea TC spirale multidetettore (TCMD) guidata, nelle lesioni polmonari difficilmente raggiungibili con la sola guida delle immagini assiali, in quanto coperte da strutture scheletriche, grossi vasi o scissure pleuriche.

Materiali e metodi

Eseguita agobiopsia transtoracica (TNB, transthoracic needle biopsy) TCMD-guidata in 84 pazienti (55 maschi e 29 femmine, età media 65 anni) con lesione polmonare sospetta per neoplasia. Impiegato scanner TCMD a scansione elicoidale, con acquisizione simultanea di sei strati per ogni rotazione completa. Sulla base di immagini assiali native ed MPR sagittali o coronali è stato introdotto un ago “Chiba Point” centimetrato da 22 gauge (G) scegliendo: il tragitto più breve in cui non si sovrappongano grossi vasi, bronchi principali e lobari, scissure pleuriche e strutture scheletriche; ingresso nel parenchima polmonare il più perpendicolare possibile al piano pleurico; le zone di tessuto non calcifico più dense della lesione da sottoporre a biopsia.

Risultati

Nel 96% dei casi si è ottenuto un prelievo diagnostico. In 73 pazienti le lesioni sottoposte ad agobiopsia avevano caratteristiche di nodulo solido non calcifico di dimensioni inferiori ai 2 cm; 11 lesioni erano masse neoplastiche. In ventidue noduli è stato necessaria la guida bioptica con immagini MPR in quanto lesioni “coperte” da coste (18 noduli), da scissure (2 noduli) o a localizzazione ilo-mediastinica (2 noduli).

Conclusioni

Le immagini MPR ottenute con TCMD hanno permesso di raggiungere lesioni polmonari considerate un tempo inaccessibili con la sola guida delle immagini TCMD assiali. L’impiego della immagini MPR, inoltre, non incrementa, rispetto alla procedura convenzionale né i casi di pneumotorace (PNX) né il tempo di esecuzione del prelievo.

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Correspondence to M. De Filippo.

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De Filippo, M., Onniboni, M., Rusca, M. et al. Advantages of multidetector-row CT with multiplanar reformation in guiding percutaneous lung biopsies. Radiol med 113, 945–953 (2008). https://doi.org/10.1007/s11547-008-0325-y

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  • DOI: https://doi.org/10.1007/s11547-008-0325-y

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