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Objective To explore optimized method of estimating 131I effective half-life(EHL) in patients with Graves' disease(GD).Methods The EHL was obtained by measuring thyroid radioactive iodine uptake (RAIU) of 126 patients (32 males,94 females,average age (38.47± 11.49) years) with GD at 4,24,48,96,120,144,168,192 and 216 h.Two-sample t test,bivariate correlation analysis and curve estimation were used for statistical analysis.Results The EHL of 126 patients was 0.5-7.5 (4.70±1.46) d.The EHL was 3.0-7.5(5.25±1.01) d and 0.5-6.0(3.24±1.52) d in group A (94 patients,without advanced peak of RAIU) and group B (32 patients,with advanced peak of RAIU),respectively,and the difference between the 2 groups was significant (t =8.499,P＜0.01).The EHL had no significant correlation with RAIU4h/RAIU24h(r=-0.177,P＞0.05) in group A,while it had negative correlation with RAIU4h/RAIU24h in group B (r =-0.724,P＜0.01).In group A,the EHL of patients with RAIU24h/RAIU48h ＞100％ was 3.0-7.5 (5.11 ±0.98) d,the EHL of patients with RAIU24h/RAIU48h ≤ 100％ was 4.0-7.0(5.91±0.94) d (t=3.141,P＜0.01).In group B,when RAIU4h/RAIU24h+RAIU24h/RAIU48h was used as the independent variable in S curve model to estimate the EHL,the result was the best (R2=0.930,F=397.22,both P＜0.01,b0 =-3.038 0,b1 =9.659 4).Conclusions In order to optimally estimate EHL,patients should be grouped according to 131I turnover.In patients with advanced peak of RAIU,the EHL should be calculated by using formula of (RAIU4h/RAIU24h +RAIU24h/RAIU48h).If no advanced peak of RAIU exists,patients should be further divided according to RAIU24h/RAIU48h ＞ 100％ or RAIU24h/RAIU48h ≤100％,and the EHL mean value of each group is taken as the estimated EHL.
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Objective To explore whether the degree of 99Tcm-methoxyisobutylisonitrile (MIBI) uptake in non-small cell lung cancer (NSCLC) could be correlated with the treatment response to three-dimensional conformal radiotherapy.Methods A total of 102 patients with NSCLC were studied with 99Tcm-MIBI SPECT before radiotherapy.The patients were classified by a follow-up CT as responders (complete or partial remission) and non-responders (stable or progressive disease).After intravenous administration of 740 MBq 99Tcm-MIBI, SPECT imaging at 10-30 min (early) and 2-3 h (delayed) were performed.Region of interest (ROI) was placed over the tumors and contralateral normal lung tissue.The uptake ratio of tumor to contralateral normal lung (T/N) was obtained from both early (ER) and delayed (DR) SPECT images.The retention index (RI) was measured as:RI = (DR - ER)/ER×100%.Statistical analysis was performed by two independent-sample t-test and Mann-Whitney U test using software SPSS 13.0.Results 99Tcm-MIBI uptake was significantly higher in responders than in non-responders:2.36 ±0.17 vs 1.82 ±0.14 (ER) and 2.48 ± 0.20 vs 1.94 ± 0.16 (DR), respectively (t = - 13.1,- 12.7, both P＜ 0.05).The median RI in the responders group was also significantly higher than that in the non-responders group (6.60% vs 5.13%, z = - 6.83, P ＜ 0.05).Conclusion ER, DR and RI of 99Tcm-MIBI SPECT might be useful to estimate the treatment response to three-dimensional conformal radiotherapy in patients with NSCLC.
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Ojective To evaluate the therapeutic effect of conformal radiotherapy on metastatic hepatic cancer. Methods 10 cases of metastatic hepatic cancer (1 to 5 metastatic focus respectively) were treated with stereotactic radiotherapy from Septermber 1997 to April 2000. The clinical target volume(CTV) of tumor ranged from 0.6cm 3 to 232cm 3 (the mean 41.9cm 3), peripheral irradiation doses of planning target volume (PTV) ranged from 3.96Gy to 7.00Gy(the mean 5.26Gy)each time, cential irradiation doses of PTV were 6.3Gy～10.88Gy (the mean 7.89Gy) each time, once a day for 5～8 times totally. Results No patient died during therapy. KPS of patients normal condition were 20～90(54?25.90) before treatment and 30～100 (74?23.90) after treatment. Effect of entity tumor were as follows completely relaxed (CR) in two cases, partly relaxed (PR) in four cases, no change (NC) in three cases, progressed (PD) in one case. During follow-up period tasting 2 to 28 months 90% of the tumors were controlled (no progressive disease). 60% fo the tumors decreased in size or disappeared. Conclusions Stereotactic radiotherapy has better therapeutic effects on cases of metastatic hepatic cancer.
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The use of self-expanding metal stent has been widely reported that its utility can make a palliative decompression treatment and one stage operation without doing colostomy in the patient with unresectable and resectable obstructive colorectal cancer, respectively. It, however, can sometimes cause complications such as intestinal perforation. We report that the conservative treantment could be possible without removing stent or performing laparotomy in case of intestinal perforation during chemoradiotheraphy after insert of stent for relieving colonic obstruction in the 53 years old female patient with stage IV rectal cancer.