Safety and Efficacy of Intensity-Modulated Stereotactic Body Radiotherapy Using Helical Tomotherapy for Lung Cancer and Lung Metastasis

Table 3

Characteristics of patients and tumors with local recurrence.

Patient characteristics	Number of patients
Total number of patients	7
Gender
Male/female	5/2
Age (years), median [range]	66 [63–78]
Follow-up (months), median [range]	18 [13–41]
Clinical stage
Primary (cT1N0M0) /metastasis/recurrence	3/3/1
Performance status
0/1	6/1
Previous radiotherapy
Yes/No	4/3
Previous operation
Yes/No	3/4
Previous chemotherapy
Yes/No	2/5
Double cancer
Yes/No	0/7
Tumor characteristics	Number of tumors
Location
Upper /lower lobe	5/2
Histology*
Primary
Adeno	3
Recurrence
Adeno	1
Maximum tumor diameter (mm), median [range]	17 [12–30]
CTV (cc), median [range]	3.0 [0.8–11]
PTV (cc), median [range]	9.0 [2.2–46]
PTV D95 (%), median [range]	100 [94–100]
CI, median [range]	1.0 [0.9–1.0]
HI, median [range]	1.2 [1.0–1.5]
MLD (Gy), median [range]	1.2 [0.7–2.0]
Volume of lung (cc), median [range]	3500 [2374–5278]

*Patients with no histological diagnosis are not included.
CTV: clinical tumor volume; PTV: planning target volume; CI: conformity index; HI: homogeneity index; MLD: mean lung dose.